Texas Instruments TI-89 Voyage 200 User Manual

TI-89 Titanium
Graphing Calculator

TI-89 Titanium Graphing Calculator 2

Important Information

Texas Instruments makes no warranty, either express or implied, including but not limited
to any implied warranties of merchantability and fitness for a particular purpose,
regarding any programs or book materials and makes such materials available solely on
an "as-is" basis. In no event shall Texas Instruments be liable to anyone for special,
collateral, incidental, or consequential damages in connection with or arising out of the
purchase or use of these materials, and the sole and exclusive liability of Texas
Instruments, regardless of the form of action, shall not exceed the purchase price of this
product. Moreover, Texas Instruments shall not be liable for any claim of any kind
whatsoever against the use of these materials by any other party.

USA FCC Information Concerning Radio Frequency Interference

This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation.

If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, you can try to correct the
interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

TI-89 Titanium Graphing Calculator 3

• Consult the dealer or an experienced radio/television technician for help.

Caution: Any changes or modifications to this equipment not expressly approved
by Texas Instruments may void your authority to operate the equipment.

© 2005 Texas Instruments Incorporated

Windows and Macintosh are trademarks of their respective owners.

Getting Started 4

Getting Started

Getting StartedGetting Started

Getting Started

Initial start-up

Initial start-up Initial start-up

Initial start-up

Installing the AAA Batteries

Installing the AAA BatteriesInstalling the AAA Batteries

Installing the AAA Batteries

The TI-89 Titanium uses four AAA alkaline batteries and a backup silver oxide battery
(SR44SW or 303). The backup battery is already installed, and the AAA batteries are
provided with the product.

1. Remove the battery cover from the back of the calculator.

2. Unwrap the four AAA batteries provided with your product and insert them in the
battery compartment. Arrange the batteries according to the polarity (+ and -)
diagram in the battery compartment.

3. Replace the battery cover on the calculator. The cover should snap into place.

Getting Started 5

Turning on your

Turning on your Turning on your

Turning on your TI-89 Titanium

TI-89 TitaniumTI-89 Titanium

TI-89 Titanium for the first time

for the first time for the first time

for the first time

After installing the batteries included with the calculator, press ´. The Apps desktop
appears.

Note: If your calculator initializes the preinstalled Apps, a progress bar will appear with

the message “

Installation in progress . . . Do not interrupt!” instead of the

Apps desktop. To avoid losing Apps, do not remove the batteries during initialization.
(You can re-install Apps from either the Product CD-ROM or education.ti.com

.)

Adjusting the contrast

Adjusting the contrastAdjusting the contrast

Adjusting the contrast

The Apps desktop

The Apps desktopThe Apps desktop

The Apps desktop

The Apps desktop is the starting point for operating your TI-89 Titanium. Your installed
Apps appear on the Apps desktop as icons organized in categories for easy access.
From the Apps desktop, you can:

• Open Apps.

Progress bar

• To lighten the display, press and hold 8 and tap
|.

• To darken the display, press and hold 8 and tap
«.

CHAR

VAR-LINK

Getting Started 6

• Select and edit categories of Apps.

• View all of the Apps installed on your calculator.

• View the full name of the highlighted App.

• View and edit the time and date.

• Check status line information.

• View split-screen mode information.

TI-89 Titanium Apps desktop

Ê View full name of highlighted App.

Ë View time and date.

Ì Press ¸ to open highlighted App.

Í Scroll down to view additional Apps.

Î Check status line information.

Ë

Ì

Ê

Ï

Î

Í

Getting Started 7

Ï Edit categories.

To return to the Apps desktop at any time, press O. The last category selected
appears with the last open App highlighted.

Turning off the calculator

Turning off the calculatorTurning off the calculator

Turning off the calculator

Press 2®. The next time you turn on the calculator, the Apps desktop appears with
the same settings and memory contents retained. (If you turned off the Apps desktop,
the calculator Home screen appears.)

You can use either of the following keys to turn off the TI-89 Titanium.

Press: Description

2 ® (press 2

and then press

®)

Settings and memory contents are retained by
the Constant Memory™ feature.

• You cannot, however, use 2 ® if an error

message is displayed.

• When you turn the TI-89 Titanium on again, it
displays either the Home screen or the Apps
desktop (regardless of the last application you
used).

¥ ® (press ¥

and then press

®)

Similar to

2 ® except:

• You can use ¥ ® if an error message is
displayed.

• When you turn the TI-89 Titanium on again, it
will be exactly as you left it.

Getting Started 8

Note: ® is the second function of the ´ key.

The calculator’s Automatic Power Down™ (APD™) feature prolongs battery life by
turning the calculator off automatically following several minutes of inactivity. When you
turn on the calculator after APD:

• The display, cursor, and any error conditions are exactly the same as before APD.

• All settings and memory contents are retained.

Note: APD does not occur if a calculation or program is in progress, unless the program

is paused. If a program is running but waiting for a key press, APD will occur after
several minutes of inactivity.

Getting Started 9

TI-89 Titanium

TI-89 TitaniumTI-89 Titanium

TI-89 Titanium keys

keys keys

keys

Ë

Ì

Í

Ê

Getting Started 10

TI-89 Titanium keys

Ê Function keys (ƒ– Š) open toolbar menus, access Apps, and edit categories of
Apps.

Ë Cursor keys (A, B, C, D) move the cursor.

Ì Numeric keypad performs math and scientific functions.

Í Modifier keys (2, 8, 7) add features by increasing the number of key commands.

Entering special characters

Entering special charactersEntering special characters

Entering special characters

Use the CHAR (Character) menu and key commands to enter special characters. The
CHAR menu lets you access Greek, math, international, and other special characters.
An on-screen keyboard map shows the locations of shortcuts used to enter other
commonly used characters.

To select characters from the CHAR menu:

1. Press 2G. The CHAR menu appears.

2. Use the cursor keys to select a category. A submenu lists the characters in that
category.

3. Use the cursor keys to select a character, and press ¸.

Getting Started 11

Example: Enter the right arrow symbol (→) in the Text Editor.

To open the keyboard map, press 8”. The keyboard map appears.

Press Result

2G

4

9

– or –

Press

D repeatedly to

select 9:

→

and press

¸

Scroll down for
more characters.

Symbol displayed at cursor
location.

Getting Started 12

To type most characters, press 8 and the corresponding key. Press N to close the
map.

Example: Use the keyboard map to find the “not equal to” symbol (ƒ) shortcut and enter
the symbol in the Program Editor.

Press Result

8”

¥Á

Symbol
displayed at
cursor location.

Getting Started 13

Modifier keys

Modifier keysModifier keys

Modifier keys

Modifier keys add features by increasing the number of keyboard operations at your
fingertips. To access a modifier function, press a modifier key and then press the key for
the corresponding operation.

Keys Description

2

(Second)

Accesses Apps, menu options, and other
operations. Second functions are printed above
their corresponding keys in the same color as

the

2 key.

8

(Diamond)

Accesses Apps, menu options, and other
operations. Diamond functions are printed
above their corresponding keys in the same

color as the

8 key.

¤

(Shift)

Types an uppercase character for the next letter
key you press. Also used with A and B to
highlight characters when editing.

j

(Alpha)

Lets you type alphabetic characters without a
QWERTY keypad. Alpha characters are printed
above their corresponding keys in the same
color as the

j key.

Getting Started 14

Example: Access the VAR-LINK [All] screen, where you can manage variables and Apps.

Function keys

Function keysFunction keys

Function keys

Use the function keys to perform the following operations:

• On the Apps desktop, open Apps and select or edit Apps categories.

• On the calculator Home screen, open toolbar menus to select math-related
operations.

• Within Apps, open toolbar menus to select App options.

Numeric keypad

Numeric keypadNumeric keypad

Numeric keypad

The numeric keypad lets you enter positive and negative numbers.

To enter a negative number, press ? before typing the number.

Note: Don’t confuse the negation key (?) with the subtraction key (|).

Press Result

2°

Getting Started 15

To enter a number in scientific notation:

1. Type the numbers that precede the exponent. (This value can be an expression.)

2. Press ^. The exponent symbol (í) follows the numbers you entered.

3. Type the exponent as an integer with up to three digits. (As the following example
shows, you can use a negative exponent.)

Example: On the calculator Home screen, enter 0.00685 using scientific notation.

Other important keys

Other important keysOther important keys

Other important keys

Press Result

6 ¶ 85

^

?

3

¸

Key Command Description

8#

Displays the Y= Editor.

Getting Started 16

8$

Displays the Window Editor.

8%

Displays the Graph screen.

8&

Sets parameters for the Table
screen.

8'

Displays the Table screen.

¥5
¥6
¥7

These keys let you edit entered
information by performing a cut,
copy, or paste operation.

O

Displays the Apps desktop.

8 O

With the Apps desktop off,
displays the FLASH
APPLICATIONS menu.

2a

Switches between the last two
chosen Apps.

2¾

Turns the custom menu on and off.

24

Converts measurement units.

¥

Designates a measurement unit.

0

Deletes the character to the left of
the cursor (backspace).

8.

Deletes the character to the right
of the cursor.

2/

Switches between insert and
overwrite modes.

Key Command Description

Getting Started 17

Mode settings

Mode settings Mode settings

Mode settings

Modes control how the TI-89 Titanium displays and interprets information. All numbers,
including elements of matrices and lists, are displayed according to the current mode
settings. When the TI-89 Titanium is turned off, the Constant Memory™ feature retains
all of the mode settings you have selected.

To view the TI-89 Titanium mode settings:

2¯

Displays the MEMORY screen.

½

Displays a list of commands.

2£

Recalls the contents of a variable.

§

Stores a value to a variable.

2G

Displays the CHAR menu, which
lets you select Greek letters,
international accented characters,
and other special characters..

2K

• In full-screen mode, displays
the Apps desktop.

• In split-screen mode, displays
the full-screen view of the active
App.

• With the Apps desktop off,
displays the calculator Home
screen.

Key Command Description

Getting Started 18

1. Press 3. Page 1 of the MODE dialog box appears.

2. Press „ or … to display the modes listed on Page 2 or Page 3.

Note: Modes that are grayed out are available only if other required mode settings are

selected. For example, the Custom Units mode listed on Page 3 is available only if the
Unit System mode is set to CUSTOM.

Viewing mode settings

Viewing mode settingsViewing mode settings

Viewing mode settings

Press Result

3

ã„

Getting Started 19

Changing mode settings

Changing mode settingsChanging mode settings

Changing mode settings

Example: Change the Language mode setting to Spanish (Español).

…

Press Result

3

…

Press Result

Getting Started 20

Scroll down to the Language

field.

D

Press B

and then press D until

3:Español is highlighted.

Note:

Your menu list might
vary, depending on the
languages installed.

¸

Press Result

Getting Started 21

To return the Language mode setting to English, repeat the steps, selecting 1:English in
the Language field.

Using the Catalog to access commands

Using the Catalog to access commands Using the Catalog to access commands

Using the Catalog to access commands

Use the Catalog to access a list of TI-89 Titanium commands, including functions,
instructions, and user-defined programs. Commands are listed alphabetically.
Commands not beginning with a letter are found at the end of the list (&, /, +, –, etc.).

The Catalog Help App includes details about each command.

Options not currently valid are grayed out. For example, the Flash Apps
(

…) menu option is grayed out if no Flash applications are installed on your TI-89

Titanium; the User-Defined (

†) menu option is grayed out if you have not created a

function or program.

¸

Note: The previous open App

appears (in this example, the
calculator Home screen).

Press Result

Getting Started 22

Note: Typing a letter takes you to the first command in the list starting with the same

letter.

Select commands from the Catalog and insert them onto the calculator Home screen
entry line or paste them to other Apps, such as the Y= Editor, Text Editor, or CellSheet
Apps.

Press Result

½

(displays Built-in commands)

…

(displays Flash Apps

commands, if any)

†

(displays User-Defined

commands, if any)

Getting Started 23

Example: Insert the comDenom( command on the calculator Home screen entry line.

Note: Before selecting a command, position the cursor where you want the command to

appear.

Pressing 2D advances the Catalog list one page at a time.

The status line displays any required and optional parameters for the selected
command. Optional parameters appear in square brackets.

Note: Pressing ƒ will also display the parameters for the selected command.

Press Result

½ C

2D

Then press D until the pointer is

at the comDenom( function.

¸

Getting Started 24

To exit the Catalog without selecting a command, press N.

Calculator Home screen

Calculator Home screenCalculator Home screen

Calculator Home screen

The calculator Home screen is the starting point for math operations, including executing
instructions, evaluating expressions, and viewing results.

To display the calculator Home screen, press: "

You can also display the calculator Home screen from the Apps desktop by highlighting
the Home icon and pressing ¸.

Selected
command

Command
parameters

Brackets [ ] indicate optional parameters

Getting Started 25

Ê History area lists the entry/answer pairs entered.

Ë Tabs display menus for selecting lists of operations. Press ƒ, „, and so on to

display menus.

Ì Result of last entry is displayed here. (Note that results are not displayed on the entry
line.)

Í Status line shows the current state of the calculator.

Î Entry line displays your current entry.

Ï Your previous entry is displayed here.

To return to the Apps desktop from the calculator Home screen, press O.

Ê

Ë

Ï

Î

Í

Ì

Getting Started 26

About the history area

About the history areaAbout the history area

About the history area

The history area displays up to eight entry/answer pairs, depending on the complexity
and height of the expressions. When the display is filled, information scrolls off the top of
the screen. Use the history area to:

• Review previous entries and answers. Use the cursor keys to view entries and

answers that have scrolled off the screen.

• Recall or auto-paste a previous entry or answer onto the entry line to reuse or edit.

(For more information, see the electronic Operating the Calculator chapter.)

The cursor, which normally rests on the entry line, can be moved into the history area.
The following table shows you how to move the cursor around in the history area.

To Do this

View entries/answers
scrolled off the screen

From the entry line, press C to highlight the last
answer.
Continue using

C to move the cursor from

answer to entry through the history area.

Go to the oldest or
newest entry/answer pair

If the cursor is in the history area, press

8C or

8D.

View an entry or answer
too long for one line (8
is displayed at the end of
the line)

Move the cursor to the entry or answer. Use A
or

B to scroll left or right and 2A or 2B to

go to the beginning or end.

Return cursor to the entry
line

Press

N, or press D until the cursor is back

on the entry line.

Getting Started 27

Interpreting history information on the status line

Interpreting history information on the status lineInterpreting history information on the status line

Interpreting history information on the status line

Use the history indicator on the status line for information about the entry/answer pairs.
For example:

If the cursor is on the entry line:

If the cursor is in the history area:

Modifying the history area

Modifying the history areaModifying the history area

Modifying the history area

To change the number of pairs that can be saved:

1. From the calculator Home screen, press ƒ and select

9:Format.

2. Press B and use C or D to highlight the new number.

3. Press ¸¸.

To clear the history area and delete all saved pairs:

• From the calculator Home screen, press ƒ and select

8:Clear Home.

– or –

Total number of pairs

currently saved

________

8/30

_______

Maximum number of
pairs that can be saved

Pair number of the

highlighted

entry/answer

_______

8/30

_______

Total number of pairs
currently saved

Getting Started 28

•Enter ClrHome on the calculator Home screen entry line.

To delete an entry/answer pair, move the cursor to either the entry or answer, and press
0 or M.

Working with Apps

Working with AppsWorking with Apps

Working with Apps

The TI-89 Titanium organizes Apps by category on the Apps desktop. To select a
category, press a function key („ through 2 Š ). The App icons for the selected
category appear on the Apps desktop.

Note: If the name under an Apps desktop icon is truncated, use the cursor keys to

highlight the icon. Now view the full name at the top of the Apps desktop.

Opening Apps

Opening AppsOpening Apps

Opening Apps

Use the cursor keys or press the first letter of the App name to highlight the Apps icon on
the Apps desktop and press ¸. The App either opens directly or displays a dialog
box. The most common dialog box lists these options for the App:

Note: The TI-89 Titanium uses the general term variable to refer to the App data files that

you create.

Option Description

Current Returns the screen displayed when you last viewed

the App. If no current App variable exists, the New
dialog box appears.

Open Lets you open an existing file.

Getting Started 29

Select an option, enter any required information, and press ¸. The App appears.

Example: Create a new program using the Program Editor.

New Creates a new file with the name typed in the field.

Press Result

Use cursor keys to highlight

¸

3

Option Description

Getting Started 30

The newly created program variable, program1, is saved to the Main folder.

¸

DD

program1

¸¸

Press Result

Getting Started 31

Returning to the Apps desktop from within an App

Returning to the Apps desktop from within an AppReturning to the Apps desktop from within an App

Returning to the Apps desktop from within an App

Press O. The icons for the last Apps category selected appear on the Apps desktop
with the icon for the last App opened highlighted.

You can also return to the Apps desktop by pressing 2K in full-screen mode. In
split-screen mode, press 2K twice.

To return to the last open App from the Apps desktop, press 2a.

Selecting an Apps category

Selecting an Apps categorySelecting an Apps category

Selecting an Apps category

On the TI-89 Titanium, the Apps category names appear only in the

F1 Menu. To select

an Apps category, press ƒ

2:Select Category and use the cursor keys to highlight an

Apps category, and then press ¸ to select the highlighted category. You can also
use the function key shortcuts to select a category from the keypad (use the 2 key if
necessary). The App icons for the selected category appear on the Apps desktop.

The App icons for the selected category appear on the Apps desktop.

Key Description

„ All

Icons for all installed Apps displayed. Not
customizable.

… English

Customizable category. English is the default.

† SocialSt

Customizable category. SocialSt (social studies)
is the default.

‡ Math

Customizable category. Math is the default.

Getting Started 32

Example: Select the All category.

If you select an Apps category containing no Apps, a message appears to confirm that
the category is empty and point you to the ƒ

1:Edit Categories menu, where you can

add App shortcuts to the category. (See “Customizing the Apps

categories” on page 33.)

Press ¸ or N to clear the message and return to the Apps desktop.

2 ˆ

Graphing

Customizable category. Graphing is the default.

2 ‰ Science

Customizable category. Science is the default.

2 Š Organizr

Customizable category. Organizr (organizer) is
the default.

Press Result

„

Key Description

Getting Started 33

Customizing the Apps

Customizing the Apps Customizing the Apps

Customizing the Apps categories

categoriescategories

categories

The TI-89 Titanium organizes your Apps into seven categories, six of which you can
customize to fit your individual needs. (The All category contains every installed App and
cannot be edited.)

To customize the … through 2Š Apps categories:

1. Select ƒ

1:Edit Categories. A submenu displays the six customizable Apps

category names. (The All category is not listed.)

2. Highlight an Apps category and press ¸. The Edit Categories dialog box

appears with a list of installed Apps and a text box with the category name
highlighted.

3. To change the Apps category name, type the desired name.

Note: Enter a name of up to eight characters, including letters with or without

capitalization, numbers, punctuation, and accented characters.

4. To add or remove an App shortcut from the category, press D as required to

highlight the box next to the App, then press B to add or remove the check mark (9).

5. To save the changes and return to the Apps desktop, press ¸.

Getting Started 34

Example: Replace the Social Studies category with the Business category and add the
CellSheet and Finance App shortcuts.

Press Result

ƒ

B

2

– or –

D¸

Getting Started 35

2 ™

¤

Bus iness

D

©

B

D

©

B

Press Result

Getting Started 36

Open Apps and split-screen status

Open Apps and split-screen statusOpen Apps and split-screen status

Open Apps and split-screen status

Your TI-89 Titanium lets you split the screen to view two Apps simultaneously. For
example, view the Y= Editor and Graph screens simultaneously to see the list of
functions and how they are graphed.

Select the Split Screen mode from Page 2 of the MODE screen. The TI-89 Titanium
displays the selected Apps in the split-screen view as shown. Split the screen
horizontally (top-bottom) or vertically (left-right).

¸

†

Press Result

Getting Started 37

To return to the Apps desktop, press O. The split-screen status appears at the top of
the Apps desktop with the names of the open Apps and the portions of the screen in
which each is displayed. The highlighted numeral indicates the split-screen portion
where the next App you open will appear.

Note: The Apps desktop always appears in the full-screen view.

Top-bottom split screen

Split-screen status (highlight
indicates the portion where the
next App selected will open.)

Names of open Apps

Getting Started 38

More information is available about using split screens. (For more information, see the
electronic Split Screens chapter.)

Checking status information

Checking status informationChecking status information

Checking status information

Look to the status line, located at the bottom of the screen, for information about the
current state of your TI-89 Titanium.

Indicator Meaning

Ê Current folder

Name of the selected folder (MAIN is the
default folder.)

Ë Modifier key Selected modifier key (2, 8, 7), if any.

Ì Angle mode

Selected units in which angle values are
displayed and interpreted (RAD, DEG, GRAD)

Í Exact/Approx mode

Mode in which answers are calculated and
displayed (AUTO, EXACT, APPROX)

Î Graph number

Active of two independent graphs in split­screen mode (GR#1, GR#2)

Ï Graph mode

Selected type of graph that can be plotted
(FUNC, PAR, POL, SEQ, 3D, DE)

ÊË

Ì

Í

Î

Ï

Ð

Ñ

Ò

Getting Started 39

Turning off the Apps desktop

Turning off the Apps desktopTurning off the Apps desktop

Turning off the Apps desktop

You can turn off the Apps desktop from the MODE dialog box. If you do, open Apps from
the APPLICATIONS menu. To open the APPLICATIONS menu, press O.

Example: Turn off the Apps desktop.

Ð

Entry/Answer pairs

22/30–Number of entry/answer pairs (default is
30, maximum is 99) in the history area of the
calculator Home screen.

Ñ Replace batteries

Displayed when batteries are low (BATT). If
BATT is highlighted with a black background,
change the batteries as soon as possible

().

Ò Busy/Pause,

Locked/Archived
variable

BUSY–Calculation or graph is in progress
PAUSE–You paused a graph or program

Œ–Variable opened in the current editor is

locked or archived and cannot be modified

Press Result

3

Indicator Meaning

Getting Started 40

To turn on the Apps desktop, repeat the procedure, selecting ON in the Apps Desktop
mode field. To return to the Apps desktop from the calculator Home screen, press O.

Using the clock

Using the clock Using the clock

Using the clock

Use the CLOCK dialog box to set the time and date, select the clock display format, and
turn the clock off and on.

…

DDBC

¸¸

Note: The previous open App

appears (in this example, the
calculator Home screen).

Press Result

Getting Started 41

The clock is turned on by default. If you turn off the clock, all Clock dialog box options
except Clock ON/OFF are grayed out.

Displaying the CLOCK dialog box

Displaying the CLOCK dialog boxDisplaying the CLOCK dialog box

Displaying the CLOCK dialog box

1. Use the cursor keys to highlight the Clock icon on the Apps desktop.

2. Press ¸. The CLOCK dialog box appears with the Time Format field highlighted.

Note: Because the CLOCK dialog box displays the settings current at the time you open

the dialog box, you might need to update the time before exiting.

Setting the time

Setting the timeSetting the time

Setting the time

1. Press B to open the list of time formats.

2. Press C or D to highlight an option, then press ¸. The selected format appears

in the Time Format field.

3. Press D to highlight the Hour field.

4. Type the hour, then press D to highlight the Minute field.

5. Type the minute(s).

6 indicates you

can scroll down
for more options)

Getting Started 42

6. If the time format is 24 hours, proceed to step 9.

— or —
If the time format is 12 hours, press D to highlight the AM/PM field.

7. Press B to open the list of AM/PM options.

8. Press C or D to highlight an AM/PM option, then press ¸. The selected AM/PM

option appears.

9. Set the date (for procedures, see Setting the date).

— or —
To save your settings and exit, press ¸. The time is updated in the top right

corner of the Apps desktop.

Setting the date

Setting the dateSetting the date

Setting the date

1. Press C or D as required to highlight the Date Format field.

2. Press B to open the list of date formats.

3. Press C or D to highlight an option, then press ¸. The selected format appears

in the Date Format field.

4. Press D to highlight the Year field.

5. Type the year, then press D to highlight the Month field.

6. Press B to open the list of months.

7. Press C or D to highlight an option, then press ¸. The selected month appears

in the Month field.

8. Press D to highlight the Day field.

Getting Started 43

9. Type the day, then press ¸ ¸ to save your settings and exit. The date is

updated in the top right corner of the Apps desktop.

Example: Set the time and date to 19/10/02 (October 19, 2002) at 1:30 p.m.

Press Result

Use cursor keys to highlight

¸

D

1 D

Time and date

Getting Started 44

30 D

BD

¸D

Press Result

Getting Started 45

BD

¸D

2002

Press Result

Getting Started 46

DB

Scroll down to October

and press ¸

D

19

Press Result

Getting Started 47

Turning off the clock

Turning off the clockTurning off the clock

Turning off the clock

From the Apps desktop, open the CLOCK dialog box and select OFF in the Clock field.

Example: Turn off the clock.

¸¸

Press Result

Use cursor keys to highlight

Press Result

Revised time and date

Clock on

Getting Started 48

To turn on the clock, repeat the procedure, selecting ON in the Clock field. Remember to
reset the time and date.

¸

Scroll down to the Clock field.

BC ¸

¸

Press Result

Clock off

Getting Started 49

Using menus

Using menusUsing menus

Using menus

To select most TI-89 Titanium menus, press the function keys corresponding to the
toolbars at the top of the calculator Home screen and most App screens. Select other
menus using key commands.

Toolbar menus

Toolbar menusToolbar menus

Toolbar menus

The starting point for TI-89 Titanium math operations, the calculator Home screen
displays toolbar menus that let you choose math-related options.

Toolbar menus also appear at the top of most App screens. These menus list common
functions of the active App.

Other menus

Other menusOther menus

Other menus

Use key commands to select the following menus. These menus contain the same
options regardless of the screen displayed or the active App.

Press To display

2G

CHAR menu. Lists characters not available on the
keyboard; characters are organized by category
(Greek, math, punctuation, special, and
international).

2I

MATH menu. Lists math operations by category.

Getting Started 50

Selecting menu options

Selecting menu optionsSelecting menu options

Selecting menu options

• Press the number or letter to the left of the option you want to select.

— or —

• Press C or D to select the option, and press ¸.

Note: If the first menu option is selected, press C to select the last option on the menu. If

the last menu option is selected, press D to select the first option on the menu.

O

APPLICATIONS menu. Lists the installed Apps.
(Menu is available only when the Apps desktop is
turned off; Apps are normally accessed from the
Apps desktop.)

8O

FLASH APPLICATIONS menu. Lists the installed
Flash Apps. (Menu is available only when Apps
desktop is turned off; Flash Apps are normally
accessed from the Apps desktop.)

Press To display

Getting Started 51

Example: Select factor( from the Algebra menu on the calculator Home screen.

Press Result

Press:

"

– or –

From the Apps desktop, use the

cursor keys to highlight

and press ¸

„

2

– or –

D¸

6 indicates

Algebra menu will
open when you
press

„.

Getting Started 52

Selecting submenu options

Selecting submenu optionsSelecting submenu options

Selecting submenu options

A small arrow symbol (ú) to the right of a menu option indicates that selecting the option
will open a submenu.

Example: Select

ord( from the MATH menu on the calculator Home screen.

Press Result

2I

$ points to

additional options.

Getting Started 53

Using dialog boxes

Using dialog boxesUsing dialog boxes

Using dialog boxes

An ellipsis (…) at the end of a menu option indicates that choosing the option will open a
dialog box. Select the option and press ¸.

D

– or –

CCB

B

– or –

C¸

Press Result

Getting Started 54

Example: Open the SAVE COPY AS dialog box from the Window Editor.

Press Result

O

Use the cursor keys to highlight

and press ¸

ƒ

2

– or –

D¸

Press B to display
a list of folders.

Type the name of
the variable.

Press

¸ twice to save and

Getting Started 55

Note: Pressing the 8 S key shortcut also opens the SAVE COPY AS dialog box in most

Apps.

Canceling a menu

Canceling a menuCanceling a menu

Canceling a menu

To cancel a menu without making a selection, press N.

Moving among toolbar menus

Moving among toolbar menusMoving among toolbar menus

Moving among toolbar menus

To move among the toolbar menus without selecting a menu option:

• Press the function key (ƒ through Š) of a toolbar menu.

• Press a function key, then press B or A to move from one toolbar menu to the next.

Press B from the last menu to move to the first menu. Press A to move from the first
menu to the last menu.

Note: If you press B when a menu option with a submenu is selected, the submenu will

appear instead of the next toolbar menu. Press B again to move to the next menu.

More information is available about menus. (See the electronic Operating the Calculator
chapter.)

Custom menu

Custom menuCustom menu

Custom menu

The custom menu provides quick access to your most commonly used options. Use the
default custom menu or create your own using the Program Editor. You can include any
available TI-89 Titanium command or character.

Getting Started 56

The custom menu replaces the standard toolbar menu on the calculator Home screen.
(For details on creating a custom menu, see the electronic Programming chapter.) More
information is available about custom menus. (See the electronic Operating the
Calculator chapter.)

Example: Turn on and turn off the custom menu from the calculator Home screen.

Example: Restore the default custom menu.

Press Result

2F

2F

Default custom menu

Normal toolbar menu

Getting Started 57

Note: Restoring the default custom menu erases the previous custom menu. If you

created the previous custom menu with a program, you can run the program again to
reuse the menu.

Press Result

2F

(to turn off the custom menu and

turn on the standard toolbar

menu)

2 ˆ

3

– or –

DD¸

Getting Started 58

Opening Apps with the Apps desktop turned off

Opening Apps with the Apps desktop turned offOpening Apps with the Apps desktop turned off

Opening Apps with the Apps desktop turned off

If you turn off the Apps desktop, use the APPLICATIONS menu to open Apps. To open
the APPLICATIONS menu with the Apps desktop off, press O.

Note: If you press O with the Apps desktop turned on, the Apps desktop will appear

instead of the APPLICATIONS menu.

Example: With the Apps desktop turned off, open the Window Editor from the
APPLICATIONS menu.

¸

Press Result

O

Press Result

Getting Started 59

To access Apps not listed on the APPLICATIONS menu, select 1:FlashApps.

Using split screens

Using split screensUsing split screens

Using split screens

The TI-89 Titanium lets you split the screen to show two Apps at the same time. For
example, display both the Y= Editor and Graph screens to compare the list of functions
and how they are graphed.

Setting split-screen mode

Setting split-screen modeSetting split-screen mode

Setting split-screen mode

You can split the screen either top to bottom or left to right from the MODE dialog box.
The split-screen setting stays in effect until you change it.

1. Press 3 to display the MODE dialog box.

2. Press „ to display the Split Screen mode setting.

3. Press B to open the Split Screen mode menu.

4. Press D as required to highlight either TOP-BOTTOM or LEFT-RIGHT.

5. Press ¸. The Split Screen mode setting displays the option you selected.

6. Press ¸ again to save this change and display the split screen.

3

– or –

DD¸

Press Result

Getting Started 60

Example: Set split-screen mode to TOP-BOTTOM.

Press Result

3

„

BD

Getting Started 61

Setting the initial Apps for split screen

Setting the initial Apps for split screenSetting the initial Apps for split screen

Setting the initial Apps for split screen

After you select either TOP-BOTTOM or LEFT-RIGHT split-screen mode, additional
mode settings become available.

¸

¸

Press Result

Full-screen mode Split-screen mode

Getting Started 62

To set the initial App for each split-screen portion:

1. Select the Split 1 App mode setting and press B to display a menu of available

Apps. (See “Setting split-screen mode

” on page 59.)

2. Press D or C to highlight the App and press ¸.

3. Repeat steps 1 and 2 for the Split 2 App mode setting.

Example: Display the Y= Editor in the top screen and the Graph App in the bottom
screen.

Mode Description

Split 2 App Lets you specify the App displayed in the bottom or

right portion of the split screen. Works together with
Split 1 App, which lets you specify the App displayed
in the top or left portion of the split screen.

Number of Graphs Lets you set up and display two independent graphs.

Press Result

DB

Getting Started 63

2

DB

4

¸

Press Result

Getting Started 64

If you set Split 1 App and Split 2 App to the same nongraphing App or to the same
graphing App with Number of Graphs set to 1, the TI-89 Titanium exits split-screen mode
and displays the App in full-screen mode.

Selecting the active App

Selecting the active App Selecting the active App

Selecting the active App

In split-screen mode, only one App can be active at a time.

• To switch between active Apps, press 2a.

• To open a third App, press O and select the App. This App replaces the active

split-screen App.

Exiting split-screen mode

Exiting split-screen modeExiting split-screen mode

Exiting split-screen mode

Exit split-screen mode in any of the following ways:

• Press 2 K to close the active App and display the full-screen view of the other

open App.

• If the Apps desktop is turned off, pressing 2 K replaces the active split-screen

App with the calculator Home screen. Pressing 2K again turns off the split-
screen mode and displays the calculator Home screen in full-screen mode.

• Select Split Screen on Page 2 of the MODE dialog box, set split-screen mode to

FULL, and press ¸.

• Press 2 K twice to display the Apps desktop

More information is available about using split screens. (See the electronic Split Screens
chapter.)

Getting Started 65

Managing Apps and operating system (OS) versions

Managing Apps and operating system (OS) versionsManaging Apps and operating system (OS) versions

Managing Apps and operating system (OS) versions

Using the TI-89 Titanium connectivity features, you can download Apps from:

• The TI Educational & Productivity Solutions (E&PS) Web site at:

education.ti.com/latest

• The CD-ROM included with your TI-89 Titanium.

• A compatible graphing calculator.

Adding Apps to your TI-89 Titanium is like loading software on a computer. All you need
is TI Connect software and the USB computer cable that came with your TI-89
Titanium.

For system requirements and instructions to link to compatible calculators and download
TI Connect software, Apps, and OS versions, see the TI E&PS Web site.

Before downloading Apps to your TI-89 Titanium, please read the license agreement on
the CD-ROM or TI Web site.

Finding the OS version and identification (ID) numbers

Finding the OS version and identification (ID) numbers Finding the OS version and identification (ID) numbers

Finding the OS version and identification (ID) numbers

If you purchase software from the TI E&PS Web site or call the customer support
number, you will be asked to provide information about your TI-89 Titanium. You will find
this information on the ABOUT screen.

Getting Started 66

To display the ABOUT screen, press ƒ 3:About from the Apps desktop. The ABOUT
screen displays the following information about your TI-89 Titanium:

Ê OS version

Ë Hardware version

Ì Unit ID (required to obtain certificates for installing purchased Apps). Similar to a serial

number. Write this number down and keep it in a safe place in case the calculator is ever
lost or stolen.

Í Apps certificate revision number (Cert. Rev.)

Î Product identifier (Product ID). Similar to a model number.

Note that your screen will be different than the one shown above.

Ë

Ì

Ê

Î

Í

Getting Started 67

Deleting an Application

Deleting an ApplicationDeleting an Application

Deleting an Application

Deleting an application removes it from the TI-89 Titanium and increases space for other
applications. Before deleting an application, consider storing it on a computer for
reinstallation later.

1. Quit the application.

2. Press 2° to display the VAR-LINK (All) screen.

3. Press 2 ‰ to display the list of installed applications.

4. Select the application you want to delete by pressing †. (Press † again to

deselect.)

5. Press ƒ

1:Delete. The VAR-LINK delete confirmation dialog box displays.

6. Press ¸ to delete the application.

Note: Only Flash Apps can be deleted.

Connecting your

Connecting your Connecting your

Connecting your TI-89 Titanium

TI-89 TitaniumTI-89 Titanium

TI-89 Titanium to other devices

to other devices to other devices

to other devices

The TI-89 Titanium includes both a mini-USB port and a standard I/O port. Ports are
used to link two compatible graphing calculators or connect to a computer or peripheral
device.

In addition, the teacher model of the TI-89 Titanium includes an accessory port. This port
is used to output visual data so that a classroom can view the calculator’s display on a
video device or overhead screen.

To connect your calculator to a computer – Connect your TI-89 Titanium using the
USB port and the included USB computer cable.

Getting Started 68

To connect your calculator to another calculator – Use the USB unit-to-unit cable or
an I/O unit-to-unit cable to connect the TI-89 Titanium to a compatible graphing
calculator or peripheral device, such as a TI-89 or TI-92 Plus graphing calculator or the
CBL 2™ and CBR™ systems.

To show your calculator’s display to the classroom – Use the accessory port to
connect the TI-Presenter™ video adapter to the teacher model of the TI-89 Titanium.
The TI-Presenter video adapter provides a video interface between the calculator and
video display or recording devices. Or use the accessory port to connect the
TI ViewScreen overhead panel to your calculator. The TI ViewScreen overhead panel
enlarges and projects the display so an entire class can view it. For more information
about the TI-Presenter video adapter and TI ViewScreen panel, see the TI E&PS Web
site at education.ti.com

.

I/O portUSB port

TI-89 Titanium ports

Getting Started 69

Batteries

BatteriesBatteries

Batteries

The TI-89 Titanium uses four AAA alkaline batteries and a backup silver oxide battery
(SR44SW or 303). The backup battery is already installed, and the AAA batteries are
provided with your product.

Important OS download information

Important OS download informationImportant OS download information

Important OS download information

New batteries should be installed before beginning an OS download.

When in OS download mode, the APD feature does not function. If you leave your
calculator in download mode for an extended time before you actually start the
download, your batteries may become depleted. You will then need to replace the
depleted batteries with new batteries before downloading.

Accessory port

I/O portUSB port

TI-89 Titanium ports (teacher model)

Getting Started 70

You can also transfer the OS to another TI-89 Titanium using a USB unit-to-unit cable . If
you accidentally interrupt the transfer before it is complete, you will need to reinstall the
OS via a computer. Again, remember to install new batteries before downloading.

Please contact Texas Instruments as described in Service & Support Information, if you
experience a problem.

Battery Precautions

Battery PrecautionsBattery Precautions

Battery Precautions

Take these precautions when replacing batteries:

• Do not leave batteries within the reach of children.

• Do not mix new and used batteries. Do not mix brands (or types within brands) of

batteries.

• Do not mix rechargeable and non-rechargeable batteries.

• Install batteries according to polarity (+ and –) diagrams.

• Do not place non-rechargeable batteries in a battery recharger.

• Properly dispose of used batteries immediately.

• Do not incinerate or dismantle batteries.

Installing the AAA Batteries

Installing the AAA BatteriesInstalling the AAA Batteries

Installing the AAA Batteries

1. Remove the battery cover from the back of the calculator.

2. Unwrap the four AAA batteries provided with your product and insert them in the

battery compartment. Arrange the batteries according to the polarity (+ and -)
diagram in the battery compartment.

Getting Started 71

3. Replace the battery cover on the calculator. The cover should snap into place.

Replacing the AAA (alkaline) batteries

Replacing the AAA (alkaline) batteriesReplacing the AAA (alkaline) batteries

Replacing the AAA (alkaline) batteries

As the batteries lose power, the display begins to dim, especially during calculations. If
you find yourself increasing the contrast frequently, replace the AAA alkaline batteries.

The status line also gives battery information.

Before replacing the batteries, turn off the TI-89 Titanium by pressing 2® to avoid
losing information stored in memory. Do not remove both the back-up battery and the
AAA alkaline batteries at the same time.

Indicator Meaning

Batteries are low.

Replace batteries as soon as possible.

Getting Started 72

Replacing the backup (silver oxide) battery

Replacing the backup (silver oxide) batteryReplacing the backup (silver oxide) battery

Replacing the backup (silver oxide) battery

1. To replace the silver oxide backup battery, remove the battery cover and unscrew

the tiny screw holding the BACK UP BATTERY cover in place.

2. Remove the old battery and install a new SR44SW or 303 battery, positive (+) side

up. Replace the cover and the screw.

Previews 73

Previews

PreviewsPreviews

Previews

Performing Computations

Performing ComputationsPerforming Computations

Performing Computations

This section provides several examples for you to perform from the Calculator Home
screen that demonstrate some of the computational features of the TI-89 Titanium. The
history area in each screen was cleared by pressing ƒ and selecting

8:Clear Home,

before performing each example, to illustrate only the results of the example’s
keystrokes.

Showing Computations

Showing ComputationsShowing Computations

Showing Computations

Steps and keystrokes Display

Compute sin(p/4) and display the result in
symbolic and numeric format. To clear the
history area of previous calculations, press ƒ
and select

8:Clear Home.

Press 2 W 2 T e 4 d ¸ 8 ‘

Previews 74

Finding the Factorial of Numbers

Finding the Factorial of NumbersFinding the Factorial of Numbers

Finding the Factorial of Numbers

Expanding Complex Numbers

Expanding Complex NumbersExpanding Complex Numbers

Expanding Complex Numbers

Steps and keystrokes Display

Compute the factorial of several numbers to
see how the TI-89 Titanium handles very
large integers. To get the factorial operator (!),
press 2I, select

7:Probability, and then

select

1:!.

Press 5 2 I 7 1 ¸ 20 2 I 7 1
¸ 30 2 I 7 1 ¸

Steps and keystrokes Display

Compute (3+5i)3 to see how the TI-89
Titanium handles computations involving
complex numbers.

Press c 3 « 5 2 ) d Z 3 ¸

Previews 75

Finding Prime Factors

Finding Prime FactorsFinding Prime Factors

Finding Prime Factors

Finding Roots

Finding RootsFinding Roots

Finding Roots

Steps and keystrokes Display

Compute the factors of the rational number

2634492. You can enter “factor” on the entry
line by typing

FACTOR on the keyboard, or by

pressing „ and selecting

2:factor(.

Press „ 2 2634492 d ¸

(Optional) Enter other numbers on your own.

Steps and keystrokes Display

Find the root of the expression (x,y). You can
enter “root” on the entry line by typing

ROOT

on the keyboard, or by pressing 8 9.

This example illustrates using the root
function and how the expression is displayed
in “pretty print” in the history area.

Press 8 9 X b Y d ¸

Previews 76

Expanding Expressions

Expanding ExpressionsExpanding Expressions

Expanding Expressions

Reducing Expressions

Reducing ExpressionsReducing Expressions

Reducing Expressions

Steps and keystrokes Display

Expand the expression (xN5)3. You can enter
“expand” on the entry line by typing

EXPAND

on the keyboard, or by pressing „ and
selecting

3:expand(.

Press „ 3 c X | 5 d Z 3 d ¸

(Optional) Enter other expressions on your
own.

Steps and keystrokes Display

Reduce the expression (x2N2xN5)/(xN1) to its
simplest form. You can enter “propFrac” on
the entry line by typing

PROPFRAC on the

keyboard, or by pressing „ and selecting

7:propFrac(.

Press „ 7 c X Z 2 | 2 X | 5 d e c X |
1 d d ¸

Previews 77

Factoring Polynomials

Factoring PolynomialsFactoring Polynomials

Factoring Polynomials

Solving Equations

Solving EquationsSolving Equations

Solving Equations

Steps and keystrokes Display

Factor the polynomial (x2N5) with respect to x.
You can enter “factor” on the entry line by
typing

FACTOR on the keyboard or by

pressing „ and selecting

2:factor(.

Press „ 2 X Z 2 | 5 b X d ¸

Steps and keystrokes Display

Solve the equation x2N2xN6=2 with respect to
x.

You can enter “

solve(” on the entry line by

selecting “

solve(” from the Catalog menu, by

typing

SOLVE( on the keyboard, or by

pressing „ and selecting

1:solve(.

The status line area shows the required
syntax for the marked item in the

Catalog

menu.

Press „ 1 X Z 2 | 2 X | 6 Á 2 b X d

¸

Previews 78

Solving Equations with a Domain Constraint

Solving Equations with a Domain ConstraintSolving Equations with a Domain Constraint

Solving Equations with a Domain Constraint

Solving Inequalities

Solving InequalitiesSolving Inequalities

Solving Inequalities

Steps and keystrokes Display

Solve the equation x2N2xN6=2 with respect to
x where x is greater than zero. The “with” (I)
operator provides domain constraint.

Press „ 1 X Z 2 | 2 X | 6 Á 2 b X d Í
X 2 Ã 0 ¸

Steps and keystrokes Display

Solve the inequality (x2>1,x) with respect to x.

Press „ 1XZ 2 2Ã1 d¸

Previews 79

Finding the Derivative of Functions

Finding the Derivative of FunctionsFinding the Derivative of Functions

Finding the Derivative of Functions

Finding Implicit Derivatives

Finding Implicit DerivativesFinding Implicit Derivatives

Finding Implicit Derivatives

Steps and keystrokes Display

Find the derivative of (xNy)3/(x+y)2 with
respect to x.

This example illustrates using the calculus
differentiation function and how the function is
displayed in “pretty print” in the history area.

Press 2 = c X | Y d Z 3 e c X « Y
d Z 2 b X d ¸

Steps and keystrokes Display

Compute implicit derivatives for equations in
two variables in which one variable is defined
implicitly in terms of another.

This example illustrates using the calculus
implicit derivative function.

Press … D X Z 2 « Y Z 2 Á 100 bX b Y

d ¸

Previews 80

Finding the Integral of Functions

Finding the Integral of FunctionsFinding the Integral of Functions

Finding the Integral of Functions

Solving Problems Involving Vectors

Solving Problems Involving VectorsSolving Problems Involving Vectors

Solving Problems Involving Vectors

Steps and keystrokes Display

Find the integral of x…sin(x) with respect to x.

This example illustrates using the calculus
integration function.

Press 2 < X p 2 W X d b X d ¸

Steps and keystrokes Display

1. Input a row or column of vectors.

Press 2 g ? 6 b 0 b 0 2 h §

j d ¸2 g 4 b 0 b 2 2
h § j a ¸2 g ? 1 b 2
b 1 2 h § j b ¸2 g

7 b 6 b 5 2 h § j c ¸

2. Solve (x* a+y*b+z*c=d {x,y,z})

Press „ 1 X p j a « y p j b « z

p j c Á j d b 2 [ X b Y
b Z 2 \ d ¸

Previews 81

Log to Any Base

Log to Any BaseLog to Any Base

Log to Any Base

Converting Angle Measures

Converting Angle MeasuresConverting Angle Measures

Converting Angle Measures

Steps and keystrokes Display

Find log (x,b). You can enter “log” on the entry
line by typing

LOG on the keyboard, or by

pressing 8 7.

Press

8 7 X , j b d ¸

Steps and keystrokes Display

1. Display the MODE dialog box. For Angle

mode select

DEGREE. Convert 345

degrees to Gradian angle measure.
You can enter “ ú

Grad ” on the entry line

by selecting “ ú

Grad ” from the Catalog

menu, or from the Math menu by pressing
2 I and selecting

2:angle, A:úGrad.

Press 3 D D D B 2 ¸ 345 2

v 2 I 2 j A ¸

Previews 82

Symbolic Manipulation

Symbolic ManipulationSymbolic Manipulation

Symbolic Manipulation

Solve the system of equations 2x N 3y = 4 and Lx + 7y = L12. Solve the first equation so
that x is expressed in terms of y. Substitute the expression for x into the second

2. Convert 345 degrees to Radian angle

measure.
You can enter “ ú

Rad ” on the entry line by

selecting “ ú

Rad ” from the Catalog menu,

or from the Math menu by pressing 2
I and selecting

2:angle, B:úRad.

Press 3 D D D B 2 ¸ 345 2
v 2 I 2 j B ¸

Note: You can also use ó,ô, or

G

to
override the angle mode setting
temporarily.

Steps and keystrokes Display

Previews 83

equation, and solve for the value of y. Then substitute the y value back into the first
equation to solve for the value of x.

Steps and keystrokes Display

1. Display the Home screen and clear the
entry line. Solve the equation 2x N 3y = 4
for x.

„

1 selects solve( from the Algebra

menu. You can also type

solve( directly

from the keyboard or select it from the

Catalog.

Press " M M „ 1 2 X | 3 Y
Á 4 b X d ¸

2. Begin to solve the equation Lx+7y=L12
for y, but do not press ¸ yet.

Press „ 1 ? X « 7 Y Á ? 12 b Y d

3. Use the “with” operator to substitute the
expression for x that was calculated from
the first equation. This gives the value of
y.

The “with” operator is displayed as | on
the screen.

Use the auto-paste feature to highlight the
last answer in the history area and paste
it to the entry line.

Press Í C ¸ ¸

Previews 84

This example is a demonstration of symbolic manipulation. A one-step function is
available for solving systems of equations.

Constants and Measurement Units

Constants and Measurement UnitsConstants and Measurement Units

Constants and Measurement Units

Using the equation f = m…a, calculate the force when m = 5 kilograms and a = 20
meters/second

2

. What is the force when a = 9.8 meters/second2. (This is the

4. Highlight the equation for x in the history
area.

Press C C C

5. Auto-paste the highlighted expression to
the entry line. Then substitute the value of
y that was calculated from the second
equation.

Press ¸ Í C ¸ ¸
The solution is:

x = L8/11 and y = L20/11

Steps and keystrokes Display

Previews 85

acceleration due to gravity, which is a constant named _g). Convert the result from
newtons to kilograms of force.

Steps and keystrokes Display

1. Display the MODE dialog box, Page 3. For

Unit System mode, select SI for the metric

system of measurements.
Results are displayed according to these

default units.
Press 3 … B 1 ¸

2. Create an acceleration unit for
meters/second

2

named _ms2.

The

UNITS dialog box lets you select units

from an alphabetical list of categories.
You can use 2D and 2C to scroll
one page at a time through the
categories.

If you use the

UNITS dialog box to select a

unit, the _ is entered automatically. Now,
instead of re-entering _m/_s

2

each time
you need it, you can use _ms2. Also, you
can now use the

UNITS dialog box to

select _ms2 from the Acceleration
category.

Press 2 À D B M ¸ e 2

À D D D D B S ¸ Z 2 9 8
5 2 ™ MS j 2 ¸

Previews 86

Basic Function Graphing I

Basic Function Graphing I Basic Function Graphing I

Basic Function Graphing I

The example in this section demonstrates some of the graphing capabilities of the TI-89
Titanium keystrokes. It illustrates how to graph a function using the

Y= Editor. You will

3. Calculate the force when
m = 5 kilograms (_kg) and

a = 20 meters/second

2

(_ms2).

If you know the abbreviation for a unit,
you can type it from the keyboard.

Press 5 8 5 2 ™ KG j p 20
8 5 2 ™ MS j 2 ¸

4. Using the same m, calculate the force for
an acceleration due to gravity
(the constant _g).

For _g, you can use the pre-defined
constant available from the

UNITS dialog

box or you can type _g.
Press 5 8 5 2 ™ KG j p 2

À B j G ¸ ¸

5. Convert to kilograms of force (_kgf).
2 4 displays the 4 conversion operator.
Press B 2 4 8 5 2 ™ KGF

j ¸

Steps and keystrokes Display

Previews 87

learn how to enter a function, produce a graph of the function, trace a curve, find a
minimum point, and transfer the minimum coordinates to the Home screen.

Explore the graphing capabilities of the TI-89 Titanium by graphing the function
y=(|x

2

N3|N10)/2.

Steps and keystrokes Display

1. Display the Y= Editor.
Press 8 #

2. Enter the function

(abs(x

2

N3)N10)/2.

The screen shot shows the “pretty print”
display at

y1=.

Press c ½ A ¸ X Z 2 | 3 d
| 1 0 d e 2 ¸

3. Display the graph of the function.
Select

6:ZoomStd by pressing 6 or by

moving the cursor to

6:ZoomStd and

pressing ¸.
Press „ 6

entry line

Previews 88

4. Turn on Trace.
The tracing cursor, and the x and y

coordinates are displayed.
Press …

5. Open the

MATH menu and select

3:Minimum.

Press ‡ D D ¸

6. Set the lower bound.
Press B (right cursor) to move the tracing

cursor until the lower bound for x is just to
the left of the minimum node before
pressing ¸ the second time.

Press B ... B ¸

7. Set the upper bound.
Press B (right cursor) to move the tracing

cursor until the upper bound for x is just to
the right of the minimum node.

Press B ... B

Steps and keystrokes Display

tracing cursor

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Basic Function Graphing II

Basic Function Graphing II Basic Function Graphing II

Basic Function Graphing II

Graph a circle of radius 5, centered on the origin of the coordinate system. View the
circle using the standard viewing window (

ZoomStd). Then use ZoomSqr to adjust the

viewing window.

8. Find the minimum point on the graph
between the lower and upper bounds.

Press ¸

9. Transfer the result to the Home screen,
and then display the Home screen.

Press 8 ? "

Steps and keystrokes Display

1. Display the MODE dialog box. For Graph
mode, select

FUNCTION.

Press 3 B 1 ¸

Steps and keystrokes Display

minimum point

minimum coordinates

Previews 90

2. Display the Home screen. Then store the
radius, 5, in variable r.

Press " 5 9 j R ¸

3. Display and clear the

Y= Editor. Then

define y1(x) = , the top half of
a circle.

In function graphing, you must define
separate functions for the top and bottom
halves of a circle.

Press 8 # , 8 ¸ ¸ 2 ]
j R Z 2 | X Z 2 d ¸

4. Define y2(x) = , the function for
the bottom half of the circle.

The bottom half is the negative of the top
half, so you can define y2(x) = Ly1(x).

Use the full function name

y1(x), not

simply y1.
Press ¸ ? Y 1 c X d ¸

Steps and keystrokes Display

5!r

r

2

x

2

–()

r

2

x2––

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Note: There is a gap between the top and bottom halves of the circle because each half

is a separate function. The mathematical endpoints of each half are (L5,0) and (5,0).
Depending on the viewing window, however, the plotted endpoints for each half may be
slightly different from their mathematical endpoints.

5. Select the

ZoomStd viewing window,

which automatically graphs the
functions.

In the standard viewing window, both the
x and y axes range from L10 to 10.
However, this range is spread over a
longer distance along the x axis than the
y axis. Therefore, the circle appears as
an ellipse.

Press „ 6

6. Select

ZoomSqr.

ZoomSqr increases the range along the

x axis so that circles and squares are
shown in correct proportion.

Press „ 5

Steps and keystrokes Display

Notice slight gap
between top and
bottom halves.

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Basic Function Graphing III

Basic Function Graphing IIIBasic Function Graphing III

Basic Function Graphing III

Use the “Detect Discontinuities” graph format to eliminate faux asymptotes and
connections in a jump discontinuity.

Steps and keystrokes Display

1. Display the MODE dialog box. For Graph
mode, select

FUNCTION. For Angle mode,

select

RADIAN.

Press 3 B 1 D D D B 1 ¸

2. Open the Y= Editor and enter y1(x)=1/(x-

1).
Press 8 # 1 e c X | 1 d ¸

3. Display the Graph Formats dialog box
and set “Detect Discontinuities” to OFF

Note: The second item on the Graph

Format dialog is not greyed out, which
means it can be set to sequential “Seq” or
simultaneous “Simul”.

Press 8 Í D D D D D D B 1 ¸q

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4. Execute the Graph command, which
automatically displays the Graph screen.
Observe the “faux” asymptotes contained
in the graph.

Press 8 %q

5. Display the Graph Formats dialog box
and set “Detect Discontinuities” to ON.

Note: The second item on the Graph

Format dialog is greyed out, which means
the graph order is set to sequential “Seq”.

Press 8 Í D D D D D D B 2 ¸

6. Execute the

Graph command, which

automatically displays the Graph screen.
No”faux” asymptotes are present on the
graph.

Note: Graphing speed may slow

considerably when “Detect
Discontinuities” is set to ON.

Press 8 %(q

Steps and keystrokes Display

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Parametric Graphing

Parametric GraphingParametric Graphing

Parametric Graphing

Graph the parametric equations describing the path of a ball kicked at an angle (q) of 60¡
with an initial velocity (v

0

) of 15 meters/sec. The gravity constant g = 9.8 meters/sec2.

Ignoring air resistance and other drag forces, what is the maximum height of the ball and
when does it hit the ground?

Steps and keystrokes Display

1. Display the MODE dialog box. For Graph
mode, select

PARAMETR IC.

Press 3 B 2 ¸

2. Display and clear the

Y= Editor. Then

define the horizontal component
xt1(t) = v

0

t cos q.

Enter values for v

0

and q.

Press 8 # , 8 ¸ ¸ 15T p
2 X 60 2 “ d ¸

Type T p 2 X, not T 2 X.
Enter a ¡ symbol by typing either 2“

or 2I2 1. This ensures a number
is interpreted as degrees, regardless of
the angle mode.

xt1(t)=15t…cos(60¡)

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3. Define the vertical component
yt1(t) = v

0

tsinqN(g/2)t2.

Enter values for v

0

, q, and g.

Press ¸ 15T p 2 W 60 2 “ d
| c 9.8 e 2 d T Z 2 ¸

4. Display the

Window Editor. Enter

Window variables appropriate for
this example.

You can press either D or ¸ to enter
a value and move to the next variable.

Press 8 $ 0 D 3 D .02 D ? 2
D 25 D 5 D ? 2 D 10 D 5

5. Graph the parametric equations to model
the path of the ball.

Press 8 %

6. Select

Trace. Then move the cursor

along the path to find the:

• y value at maximum height.

• t value where the ball hits the

ground.

Press … B or A as necessary

Steps and keystrokes Display

Previews 96

Polar Graphing

Polar Graphing Polar Graphing

Polar Graphing

The graph of the polar equation r1(q) = A sin Bq forms the shape of a rose. Graph the
rose for A=8 and B=2.5. Then explore the appearance of the rose for other values of A
and B.

Steps and keystrokes Display

1. Display the MODE dialog box. For Graph
mode, select

POLAR. For Angle mode,

select

RADIAN.

Press 3 B 3 D D D B 1 ¸

2. Display and clear the

Y= Editor. Then

define the polar equation r1(q)=Asin Bq.
Enter 8 and 2.5 for A and B, respectively.
Press 8 # , 8 ¸ ¸ 8 2 W

2.5 8 Ï d ¸

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3. Select the ZoomStd viewing window,
which graphs the equation.

• The graph shows only five rose

petals.

- In the standard viewing window,
the Window variable qmax = 2p.
The remaining petals have q
values greater than 2p.

• The rose does not appear
symmetrical.

- Both the x an y axes range from

L10 to 10. However, this range is
spread over a longer distance
along the x axis than the y axis.

Press „ 6

4. Display the

Window Editor, and change

qmax to 4p.
4p will be evaluated to a number when

you leave the

Window Editor.

Press 8 $ D 4 2 T

Steps and keystrokes Display

Previews 98

Sequence Graphing

Sequence Graphing Sequence Graphing

Sequence Graphing

A small forest contains 4000 trees. Each year, 20% of the trees will be harvested (with
80% remaining) and 1000 new trees will be planted. Using a sequence, calculate the
number of trees in the forest at the end of each year. Does it stabilize at a certain
number?

5. Select

ZoomSqr, which regraphs the

equation.

ZoomSqr increases the range along the

x axis so that the graph is shown in
correct proportion.

Press „ 5

You can change values for A and B as
necessary and regraph the equation.

Initially After 1 Year After 2 Years After 3 Years . . .

4000 .8 x 4000

+ 1000

.8 x (.8 x 4000 +

1000) + 1000

.8 x (.8 x (.8 x
4000 + 1000) +

1000) + 1000

. . .

Steps and keystrokes Display

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Steps and keystrokes Display

1. Display the MODE dialog box. For Graph
mode, select

SEQUENCE.

Press 3 B 4 ¸

2. Display and clear the

Y= Editor. Then

define the sequence as
u1(n) = iPart(.8…u1(nN1)+1000).

Use

iPart to take the integer part of the

result. No fractional trees are harvested.
To access

iPart(, you can use 2I,

simply type it, or select it from the

CATALOG.

Press 8 # , 8 ¸ ¸ 2 I
1 4 . 8 j U1 c j N | 1 d « 1000
d ¸

3. Define ui1 as the initial value that will be
used as the first term.

Press ¸ 4000 ¸

4. Display the

Window Editor. Set the n and

plot Window variables.

nmin=0 and nmax=50 evaluate the size of

the forest over 50 years.
Press 8 $ 0 D 50 D 1 D 1 D

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5. Set the x and y Window variables to
appropriate values for this example.

Press 0 D 50 D 10 D 0 D 6000 D 1000

6. Display the Graph screen.
Press 8 %

7. Select

Trace. Move the cursor to trace

year by year. How many years (nc) does it
take the number of trees (yc) to stabilize?

Trace begins at nc=0.
nc is the number of years.
xc = nc since n is plotted on the x axis.
yc = u1(n), the number of trees at
year n.

Press … B and A as necessary

Steps and keystrokes Display

By default, sequences
use the Square
display style.