Texas Instruments TI-NSpire CX II-T CAS, TI-NSpire CX II-T Guidebook

TI-Nspire™ CX II Handhelds

Guidebook

TI-Nspire™ CX II

TI-Nspire™ CX II CAS

Learn more about TI Technology through the online help at education.ti.com/eguide.

Important Information

Except as otherwise expressly stated in the License that accompanies a program, 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 amount set forth in the license for the program. Moreover, Texas Instruments shall not be liable for any claim of any kind whatsoever against the use of these materials by any other party.

TI-Nspire™ CX II License Agreement: education.ti.com/license

TI-Nspire™ CX II Warranty: education.ti.com/warranty

Limited Warranty. This warranty does not affect your statutory rights.

Vernier DataQuest™ is a trademark of its respective owner.

Actual products may vary slightly from provided images.

TI-Nspire™ CX II Handhelds: TI-Nspire™ CX II, TI-Nspire™ CX II CAS, TI-Nspire™ CX II-T, TI-Nspire™ CX II-T CAS, TI-Nspire™ CX II-C CAS, and TI-Nspire™ CX II EZ-Spot

Contents

Getting Started with TI-Nspire™ CX II Handhelds 1

About Math Modes TI-Nspire™ CX II Handheld Keys Preparing the TI-Nspire™ CX II Handheld for Use Turning On the TI-Nspire™ CX II Handheld for the First Time Adjusting the Brightness of the Backlighting Using the TI-Nspire™ Touchpad Understanding the Scratchpad Using the Home Screen The TI-Nspire™ CX II Handheld Screen Using Hints Using Keyboard Shortcuts

Using the Scratchpad 15

Opening and Closing the Scratchpad Calculating with Scratchpad Inserting Items from the Catalog Viewing the History Editing Scratchpad Expressions Graphing with the Scratchpad Working with Variables in the Scratchpad Saving the Scratchpad Contents Clearing Scratchpad Contents

15 15 16 19 20 21 25 25 26

1 2 2 3 5 5 6 6 8 9 9

Working with Documents on TI-Nspire™ CX II Handhelds 27

Opening a Document Creating a New Document Saving Documents Working with Applications Using the Application Menu Context Menus Working with Problems and Pages Adding a Problem to a Document Viewing and Reordering Pages in a Document Copying, Pasting, and Deleting Problems Renaming a Problem Adding a Page to a Problem Moving Through Pages in a Document Managing Documents Closing a Document

27 27 28 30 35 36 36 36 37 40 41 41 42 42 45

iii

Understanding the TI-Nspire™ Tools

Working with Images 50

Working with Images on a Handheld

Working in a TI-Nspire™ CX Premium Teacher Software Classroom 53

Using Wireless Communication Hardware Connecting to the TI-Nspire™ CX Navigator™ System Understanding File T ransfers

53 54 56

Configuring Handhelds 59

Checking Battery Status Recharging the Handheld Changing Handheld Settings Changing a Preferred Language Customizing the Handheld Setup Customizing Document Settings Customizing Graphs & Geometry Settings Viewing Handheld Status Replacing TI-Nspire™ Rechargeable Batteries Precautions for Rechargeable Batteries

59 59 60 61 61 62 66 68 69 70

Connecting Handhelds and Transferring Files 71

Connecting Handhelds Transferring Files between Handhelds Transferring Files between Computers and Handhelds Handling Errors Resulting from Sending Folders

71 72 73 75

File Management 78

Checking Available Storage Freeing Storage Resetting the Storage

78 78 81

Updating the Handheld Operating System 83

What You Need to Know Finding Operating System Updates Performing the OS Update Updating the OS on Multiple Handhelds OS Upgrade Messages

83 83 84 88 88

General Information 90

Precautions for Rechargeable Batteries

Getting Started with TI-Nspire™ CX II Handhelds

The TI-Nspire™ CX II and the TI-Nspire™ CX II CAS are the newest handhelds in the TINspire™ family of products. Featuring a backlit color display and a slimmer form, the handhelds provide touchpad navigation, dynamic graphing, and interactive computer features.

The handhelds and the TI-Nspire™ software share the same functionality, enabling you to transfer class assignments from the handheld to the computer or transfer documents to the handheld when you need to be mobile. Start assignments at school, and then finish the work at home to take advantage of the software’s full-color display and easy-to-use navigation. Use the software to download the latest software and handheld operating system updates as they become available to ensure you have the latest enhancements.

This guide covers the following TI-Nspire™ CX II handhelds:

• TI-Nspire™ CX II / TI-Nspire™ CX II CAS

• TI-Nspire™ CX II-T / TI-Nspire™ CX II-T CAS

• TI-Nspire™ CX II-C CAS

• TI-Nspire™ CX II EZ-Spot

While they operate identically in many ways, there are a few distinctions. If there are differences between the Numeric, Exact Arithmetic, or CAS handhelds, it is pointed out and the appropriate operation is described.

About Math Modes

TI-Nspire CX II handhelds perform calculations in one of three modes: Numeric, Exact Arithmetic, or Computer Algebra System (CAS).

Numeric mode supports results in terms of floating point numbers, integers, and

stacked fractions only.

Exact Arithmetic mode supports results in terms of floating point numbers, integers,

stacked fractions, p, e, radicals ‡, and other constants such as ln(5) and sin(2).

CAS mode supports the same results as Exact Arithmetic as well as symbol

manipulation such as x+x, and CAS functions such as symbolic factoring, solving equations, limits, and indefinite integration.

The math modes that are available will depend on which TI-Nspire CX II handheld model you have:

Handheld Model Numeric Exact A rithmetic CAS

TI-Nspire CX II

TI-Nspire CX II CAS Ÿ

Ÿ Ÿ

Getting Started with TI-Nspire™ CX II Handhelds 1

Handheld Model Numeric Exact A rithmetic CAS

TI-Nspire CX II-T Ÿ

TI-Nspire CX II-T CAS Ÿ

TI-Nspire CX II-C CAS Ÿ

CAS mode turned off

Exact Arithmetic mode turned off

Ÿ Ÿ

TI-Nspire™ CX II Handheld Keys

Use the TI-Nspire™ Touchpad as you would a laptop touchpad. You can also press the outer edges to move right, left, up, and down.

d Removes menus or dialog boxes from the

screen. Also stops a calculation in progress.

c Turns on the handheld. If

the handheld is on, this key displays the home screen.

» Opens the Scratchpad for performing quick

calculations and graphing.

e Moves to the next entry field.

~ Opens the Document menu.

bDisplays the application or

context menu.

g Makes the next character typed upper-case.

. Deletes the previous

/ Provides access to the function or character

shown above each key. Also enables shortcuts in combination with other keys.

character.

h Displays stored variables.

· Evaluates an expression,

executes an instruction, or selects a menu item.

Note: A ¢ symbol on a key indicates access to multiple options. To access an option,

press º repeatedly or use the arrow keys on the Touchpad. Press · or click to select the option.

Preparing the TI-Nspire™ CX II Handheld for Use

The TI-Nspire™ CX II handheld comes equipped with a Li-ion rechargeable battery. The handheld also comes with the following accessories:

• Standard mini-A to mini-B USB cable for transferring files to another handheld

2 Getting Started with TI-Nspire™ CX II Handhelds

• Standard A to mini-B USB cable for transferring files to and from a computer and for charging the battery

Charging the Handheld

▶ Using one of the following options, charge the battery for at least four hours to

ensure optimum performance.

- Connect the handheld to a computer using a standard A to mini-B USB cable.

To download software that includes a driver, go to education.ti.com/software.

- Connect to a wall outlet using a TI wall adapter (sold separately).

- If in a classroom setting, place the handheld or multiple handhelds in a TI-

Nspire™ CX Docking Station or a TI-Nspire™ Docking Station.

Note: The TI-Nspire™ CX II handheld has a Deep Sleep feature to maximize battery life

during extended storage periods. To put the handheld in Deep Sleep mode, press and hold down the blue reset button on the back of the handheld for at least 4 seconds. To

wake the handheld from Deep Sleep mode, press c for at least 4 seconds or apply USB (computer or wall adapter) or Docking Station power. After waking the handheld,

you can turn it on anytime by pressing c.

Note: For more information about recharging batteries, see Configuring TI-Nspire™

Handhelds.

Turning On the TI-Nspire™ CX II Handheld for the First Time

After charging the battery, presscto turn on the handheld. A progress bar is displayed while the operating system loads. Next, choose preferences for language and font size when prompted.

Note: To turn the handheld off, press / c. The settings and memory contents

are retained.

Using Automatic Power Down™

To prolong battery life, the Automatic Power Down™ (APD™) feature turns off the handheld after three minutes of inactivity. When this happens, press c to turn the

handheld on and return to the last document or last menu accessed. To change the default setting, press c 5 3 to access the Handheld Setup screen where you can

change the Power Standby setting.

Note: For more information about setting up the handheld, see Configuring Handhelds.

Choosing a Language

After the OS is loaded, select a preferred language.

Getting Started with TI-Nspire™ CX II Handhelds 3

1. Press ¢ to open the drop-down list.

2. Press6to scroll through the languages, and then press xor· to select a language.

3. Presse to highlight the OK button, and then press xor·to save the language selection.

Choosing a Font Size

Next, select a font size for the display.

1. Press ¢ to open the drop-down list.

2. Press6 to highlight the font size, and then press xor·to select it.

3. Presse to highlight the OK button, and then press xor·.

The Welcome! screen opens.

4 Getting Started with TI-Nspire™ CX II Handhelds

4. To continue, pressxor·to select OK.

The Home screen opens.

Adjusting the Brightness of the Backlighting

The screen on the TI-Nspire™ CX II handheld is backlit making it easier to use in all lighting conditions. By default, the brightness setting is medium. To adjust the backlight brightness:

• Dimmer: Press and hold/and tap-.

• Brighter: Press/and tap+.

Using the TI-Nspire™ Touchpad

Use the Touchpad to navigate or complete any task that can be completed using the arrow and Enter keys. Use the Touchpad to navigate in two ways:

• Use it like a computer touchpad by moving your fingertip in a sliding motion on the center area of the Touchpad to activate and move the mouse pointer. Click or tap the center of the Touchpad to select a menu option or complete an action.

Getting Started with TI-Nspire™ CX II Handhelds 5

• Press the arrow keys on the outside edge of the Touchpad to nudge the mouse pointer up, down, left, or right, and then click e xor press· to complete

an action.

If you hold down an arrow key, the mouse pointer continues to move in that direction.

Note: If the mouse pointer is visible on a command or file, click or tapxin the center

of the Touchpad to select that command or file. If the command or file is highlighted, move the pointer over that item or press· to select it.

When working in an application, use the Touchpad to access more information about problems. For example, hovering over a Graphs & Geometry object displays information about variables used in that object and about tools that are available.

Some users prefer to customize their Touchpad settings; to speed up or slow down their pointer, or to enable tap to click. To change the default settings for the Touchpad, see Configuring Handhelds.

Understanding the Scratchpad

Use the Scratchpad to make quick calculations and graphs without affecting the current TI-Nspire™ document. For example, when you need a quick way to test a calculation before you add it to a document, you can open the Scratchpad application and perform the calculation. Then, you can either discard the calculation or add it to a document. For more information about the Scratchpad, see Using the Scratchpad.

Using the Home Screen

The Home screen provides a starting point for all activities performed on a handheld:

• Opening the scratchpad for quick calculations and graphing

• Creating new documents

• Opening and managing existing documents

• Defining settings and viewing status

• Viewing hints for operating the handheld

• Accessing recent documents

• Returning to the current document

Note: Pressc to toggle between the Home screen and the current document.

Home Screen Options

Menu Option Purpose

Scratchpad

Use the Scratchpad menu options to open a Calculator or Graph application without affecting your document.

6 Getting Started with TI-Nspire™ CX II Handhelds

Menu Option Purpose

While in Scratchpad, press » to toggle between Scratchpad applications: Calculate and Graph.

Calculate Opens the Scratchpad with a Calculator application active. From

the Home screen, type A.

Graph Opens the Scratchpad with a Graph application active. From the

Home screen, type B.

Documents

To select options for working with documents, press the associated number or use the Touchpad to select an icon then press x or ·.

New Opens a new TI-Nspire™ document with available applications

listed.

Browse Opens the file browser where you can open existing TI-Nspire™

documents or send files to others.

Recent Lists the five most recently saved documents.

Current Goes to the document that is currently open.

Settings Check the status of the handheld and change settings.

Appl ication icons

To add a new page to the current document, select an application icon. If no document is open, a new document opens with the selected application on a new page.

Calculator

Adds a page to a document for entering and evaluating math expressions.

Graphs

Geometry

Lists & Spreadsheet

Adds a page for graphing and exploring functions.

Adds a page for creating and exploring geometric shapes.

Adds a page for working with data in tables.

Getting Started with TI-Nspire™ CX II Handhelds 7

Menu Option Purpose

Data & Statistics

Notes

Vernier DataQuest™

Adds a page and provides tools used to visualize sets of data in different types of plots and provides tools for manipulating data sets to explore relationships between the sets of data.

Provides text editing functions for adding text to TI-Nspire™ documents for use as notes or to share with other users.

Adds a page for collecting and analyzing data from sensors or probes.

To learn more about applications and documents, see Working with Documents on TI- Nspire™ Handhelds.

The TI-Nspire™ CX II Handheld Screen

When you are working in a document on a handheld, icons at the top of the screen provide information about the status of handheld operations and provide an easy way to change settings. The icons are described below.

Icon Function

Page scrolling arrows - Use the touchpad to click these arrows and scroll

¡ ¢

through the pages in a document.

Page tab - Labels the problem number and page number of the active page. For example, a label of 1.2 identifies Problem1, Page2. If problems are named, hover the pointer over a tab to view the page name.

*Doc Document name - Shows the current document name. An asterisk by the

8 Getting Started with TI-Nspire™ CX II Handhelds

document name indicates changes were made since the document was last

Icon Function

saved. Click the name to open the Documents menu.

Press to Test - Indicates that the handheld is in Press-to-Test mode.

(blinking), found an access point (solid), not communicating, connected and ready to log in (a blinking arrow), or logged in and charged (a solid arrow). Click here to view Settings & Status.

CAPS

Shows status of the g, /, andÊ keys.

RAD Angle Mode - Shows an abbreviation of the angle mode (Degrees, Radians, or

Gradians) in effect. Hover the pointer over the indicator to see the full name.

Note: Click the indicator to toggle between RAD and DEG modes.

Settings & Status - Shows an indicator of the current charge level of the

battery. Hover the pointer over the indicator to read the status as a percent. Click the icon to open the Settings & Status menu.

Close document - Click the icon to close the current document. If information is unsaved, save or discard when prompted.

Using Hints

Hints are quick tips available throughout the software on the handheld. There are

several easy ways to access Hints:

• Press/ µ.

• Some dialog boxes contain a question mark icon. Click this icon to open Hints for that task.

To scroll through the Hints, use the Touchpad or arrow keys:

• To page down, press / 3.

• To page up, press / 9.

• To go to the end of the Hints file, press / 1.

• To go back to the beginning of the file, press / 7.

Using Keyboard Shortcuts

Use the following keyboard shortcuts to perform common functions. You can also perform all functions by selecting the options from menus.

Getting Started with TI-Nspire™ CX II Handhelds 9

Getting Help

Open Hints

Editing Text

Cut

Copy

Paste

Undo

Redo

Toggle approximate and exact results

Python Editor and Shell: Add a new line after the current line.

English: Change key to include appropriate accent Chinese: Insert character

Inserting Characters and Symbols in a document

Display character/symbol palette

/ µ

/ X

/ C

/ V

/ Z / d

/ Y g d

/ ·

;

/ k

Underscore

Display math template palette

Backslash (\ )

Manual data capture point

Clear

Caps Lock

Store

10 Ge tting Started with TI-Nspire™ CX IIHandhelds

/ _

g p

/ ^

/ .

/ g

/ h

Square brackets

/ (

Curly brackets

Display Trig symbol palette

Equals symbol

Display pi symbols palette (p, à, q, and so on)

Display equality/inequality palette (>, <, ≠, ≤, ≥, and | )

Display marks and letter symbols palette (? ! $¡ ' % " : ; _ \)

Square root

log

ans

Managing Documents

Open document menu

Open document

/ )

/ =

/ q

/ s

/ u

/ v

/ O

Close document

Create new document

Insert new page

Select application

Save current document

Navigation

/ W

/ N

/ I

/ K

/ S / »

Getting Started with TI-Nspire™ CX II Handhelds 11

Top of page

Python Editor and Shell: Moves cursor to the beginning of the first line in the program.

/ 7

End of page

Python Editor and Shell: Moves cursor to the end of the last line in the program.

Page Up

Page Down

Up a level in the hierarchy

Down a level in the hierarchy

Context menu for selection

Extends selection in direction of arrow

Python Editor and Shell: Indents text on the current line or selected lines or navigates between inline prompts

Navigating in Documents

Displays previous page

Displays next page

/ 1

/ 9

/ 3

/ £

/ ¤

g Any arrow

/ ¡

/ ¢

Displays Page Sorter

Exits Page Sorter

Switch between applications on a split page

Moves focus backward within page

Python Editor and Shell: Dedents text on the current line or selected lines or navigates backwards between inline prompts

12 Ge tting Started with TI-Nspire™ CX IIHandhelds

/ £

/ 6

/ e

g e

Wizards and Templates

Add a column to a matrix after the current column

Add a row to a matrix after the current row

Python Editor and Shell: Add a new line after the current line.

Integration template

Derivative template

Math template palette

Fraction template

Modifying Display

Increase contrast

Decrease contrast

Power off

Appl ication-Specific Shortcuts

Notes/Program Editor/Python Editor: Select all

g @

g +

g -

t or / ;

/ p

/ +

/ -

/ c

/ A

Press-to-Test: Select all items in the dialog

Program Editor/Python Editor: Check syntax and store

Program Editor/Python Editor: Find

Geometry/Graph: Hide/Show Entry Line

Lists & Spreadsheet/Program Editor/Python Editor:

Go To

Program Editor/Python Editor: Find and Replace

Calculator/Program Editor/Python Editor and Shell:

Beginning of line

Getting Started with TI-Nspire™ CX II Handhelds 13

/ B

/ F

/ G

/ H

/ 8

Calculator/Program Editor/Python Editor and Shell:

End of line

/ 2

Notes: Insert math expression box

Notes: Insert chemical equation box

Open the Scratchpad

Lists & Spreadsheet: Recalculate

Program Editor: Check syntax, store program and paste

program name in Calculator (after clearing current line in Calculator)

Python Editor: Check syntax, save program and execute in Python Shell

Python Shell: Rerun last program

Geometry/Graphs/Lists & Spreadsheet: Add Function

Table

Program Editor/Python Editor and Shell: Add/remove comment symbol

Group/Ungroup applications on a page

/ M

/ E

/ R

/ T

/ 4 / / 6

14 Ge tting Started with TI-Nspire™ CX IIHandhelds

Using the Scratchpad

The Scratchpad is a feature of the TI-Nspire™ CX handheld that lets you quickly:

• Evaluate math expressions.

• Graph functions.

Opening and Closing the Scratchpad

▶ From the Home screen, press » to open the Scratchpad.

The first time you open the Scratchpad, a blank page opens with the Calculator active.

▶ Press » to alternate between the Calculate and Graph pages.

▶ Press b to see the ScratchpadCalculate or ScratchpadGraph menu. These

menus are subsets of the TI-Nspire™ menus for the Calculator and Graphs applications. For complete listings of those menus, see the documentation for those applications.

▶ Press d to close the Scratchpad.

Calculating with Scratchpad

From the ScratchpadCalculate page, enter a math expression on the entry line, and then press · to evaluate the expression. Expressions are displayed in standard

mathematical notation as you enter them.

Each evaluated expression and result becomes part of the Scratchpad history, displayed above the entry line.

Entering Simple Math Expressions

Note: To enter a negative number, press v and then type the number.

Suppose you want to evaluate

1. Select the entry line in the work area.

2. Type 2 l 8 to begin the expression.

3. Press ¢ to return the cursor to the baseline, and then complete the expression by typing:

r 43 p 12

Using the Scratchpad 15

4. Press · to evaluate the expression.

The expression is displayed in standard mathematical notation, and the result is displayed on the right side of the page.

Note: You can force a decimal approximation in a result by pressing / ·

instead of ·.

Pressing/ · forces the approximate result.

Note: Results formatting can also be adjusted in settings. For more information about

customizing settings, see Configuring Handhelds.

Inserting Items from the Catalog

You can use the Catalog to insert functions and commands, symbols, and expression templates into the entry line.

1. Press k to open the Catalog. By default, the first tab is displayed, which lists all commands and functions in alphabetical order.

2. If the function you are inserting is visible in the list, select it and press · to insert it.

3. If the function is not visible:

a) Press a letter key to jump to the entries that begin with that letter. b) Press ¤ or £ as necessary to highlight the item you are inserting.

c) Click a numbered tab to list functions by category: math functions, symbols,

math templates, library objects, and value for standard measurement units.

d) Press · to insert the item into the entry line.

Using an Expression Template

Templates help you enter matrices, piecewise functions, systems of equations, integrals, derivatives, products, and other math expressions.

16 Using the Scratchpad

For example, suppose you want to evaluate

1. Press t to open the Template palette.

2. Select to insert the algebraic sum template.

The template appears on the entry line with small blocks representing elements that you can enter. A cursor appears next to one of the elements to show that you can type a value for that element.

3. Use the arrow keys to move the cursor to each element’s position, and type a value or expression for each element.

4. Press · to evaluate the expression.

Inserting Ex pressions Using a Wizard

You can use a wizard to simplify entering some expressions. The wizard contains labeled boxes to help you enter the arguments in the expression.

For example, suppose you want to fit a y=mx+b linear regression model to the following two lists:

{1,2,3,4,5} {5,8,11,14,17}

1. Press k 1 to open the Catalog and show the alphabetic list of functions.

2. Click inside the list, and then press L to jump to the entries that begin with “L.”

Using the Scratchpad 17

3. Press ¤ as necessary to highlight LinRegMx.

4. If the Wizards On option is not checked, press e e to highlight Wizards On.

5. Press · to change the setting.

6. Press e e to highlight LinRegMx again.

LinRegMx function in a non-CAS or Exact Arithmetic handheld

LinRegMx function in a CAS handheld

7. Press ·.

A wizard opens, giving you a labeled box to type each argument.

8. Type {1,2,3,4,5} as X List.

9. Press e to move to the Y List field.

10. Type {5,8,11,14,17} as Y Lis t.

18 Using the Scratchpad

11. If you want to store the regression equation in a specific variable, press e, and then replace Save RegEqn To with the name of the function variable (f1 through f99).

12. Click OK to close the wizard and insert the expression into the entry line.

The expression is inserted along with statements to copy the regression equation and display the variable stat.results, which will contain the results.

LinRegMx {1,2,3,4,5},{5,8,11,14,17},1: CopyVar stat.RegEqn,f1: stat.results

The Scratchpad then displays the stat.re sults variables.

Note: You can copy values from the stat.result s variables and paste them into the

entry line.

Viewing the History

Each evaluated expression and result becomes part of the Scratchpad history, displayed above the entry line.

▶ Press £ or ¤ to scroll through the history.

Copying a History Item to the Entry Line

You can quickly copy an expression, subexpression, or result from the history into the entry line.

1. Press £ or ¤ to move through the history and select the item that you want to copy.

Using the Scratchpad 19

2. Optionally, select part of the expression or result by using g in combination with the arrow keys.

3. Press · to copy the selection and insert it into the entry line.

Clearing the History

When you clear the history, all variables and functions defined in the history retain their current values. If you clear the history by mistake, use the undo feature.

▶ From the Actions menu, click Clear History.

—or—

Press b 1 5.

All expressions and results are removed from the history.

Editing Scratchpad Expressions

Although you cannot edit a ScratchpadCalculate expression in the history, you can copy all or part of an expression from the history and paste it to the entry line. You can then edit the entry line.

Inserting Elements into the Entry Line

1. Press e, ¡, ¢, £, or ¤ to position the cursor in the expression.

The cursor moves to the closest valid position in the direction that you press.

2. Type the elements or insert them from the Catalog.

Selecting Part of an Expression

You can delete, cut, or copy a selected part of an expression.

1. Press ¡, ¢, £, or ¤ to move the cursor to a starting point in the expression.

2. Press and hold g and press ¡, ¢, £, or ¤ to select.

- To delete the selection, press ..

- To cut the selection to the Clipboard, press / X.

- To copy the selection to the Clipboard, press / C.

20 Using the Scratchpad

- To paste the selection to a new entry line in Scratchpad, press / V.

Graphing with the Scratchpad

1. Press » to open the ScratchpadGraph page if it is not already open.

By default, the entry line is displayed. The entry line displays the required format for typing a relation. The default graph type is Function, so the form f1(x)= is displayed.

If the entry line is not shown, press Ctrl + G or press b 2 3 to display the entry line and type an expression to graph.

2. Press b > Graph Entry/Edit and select a graph type.

For example:

• To graph an equation for a circle, press b > Graph E ntry/Edit > Equation >

Circle > (x-h)2+ (y-k)2= r

press · to draw the circle.

• To graph a function, press b > Graph Entry/Edit > Function or press

or press b 3 2 3 1. Fill in the equation and

b 3 1.

The entry line changes to display the expression format for the specified graph type. You can specify multiple relations of each graph type.

3. Type an expression and any other parameters required for the graph type.

4. Press · to graph the relation, or press ¤ to add another relation. If necessary, you can use press b 4 to choose a tool on the Window/Zoom menu and adjust

the viewing area.

When you graph the relation, the entry line disappears to show an uncluttered view of the graph. If you select or trace a plot, the relation that defines the plot is displayed on the entry line. You can modify a plot by defining a relation or by selecting and changing the graph.

As you graph multiple plots, the defining relation is displayed for each. You can define and graph a maximum of 99 relations of each type.

5. Use the b key to explore and analyze the relation to:

• Trace the relation.

• Find points of interest.

• Assign a variable in the expression to a slider.

Using the Scratchpad 21

Viewing the Table

▶ To display a table of values corresponding to the current plots, press b > Table

> Split-screen Table (b 7 1).

▶ To hide the table, click the graph side of the split screen, and then press b >

Table > Remove Table (b 7 2). You can also press Ctrl + T.

▶ To resize columns, click the table and press b > Actions > Resize (b 1 1).

▶ To delete a column, edit an expression, or edit table settings, click the table and

press b > Table (b 2).

Changing the Appearance of the Axes

As you work with graphs, the Cartesian axes are displayed by default. You can change the appearance of the axes in the following ways:

1. Press b 4 and choose the Zoom tool to use.

2. Select the axes and press / b 2 to activate the Attributes tool.

a) Press £or¤ to move to the attribute to change. For example, choose the end

style attribute.

b) Press ¡or¢ to choose the style to apply.

c) Change any other attributes of the axes as required for your work, and then

press · to exit the attributes tool.

3. Adjust the axes scale and tic mark spacing manually.

a) Click and hold one tick mark, and move it on the axis. The spacing and number

of tic marks increases (or decreases) on both axes.

b) To adjust the scale and tic mark spacing on a single axis, press and hold g,

and then grab and drag a tic mark on that axis.

4. Change axis end values by double-clicking them and typing new values.

5. Adjust the location of the axes. To move the existing axes without resizing or rescaling them, click in and drag an empty region of the screen until the axes are in the desired location.

22 Using the Scratchpad

6. Change the axes’ scales by pressing b > Window/Zoom > Window Settings (b 4 1).

Type the values of your choice over the current values for x-min, x-max, y-min, ymax, Xscale, and Yscale and click OK.

7. Press b > View > Hide Axes (b 2 1) to hide or show the axes.

• If the axes are shown on the page, selecting this tool hides them.

• If the axes are hidden on the page, selecting this tool redisplays them.

Tracing a Plot

Graph Trace moves through the points of a graphed function, parametric, polar, sequence, or scatter plot. To enable the trace tool:

1. Press b > Trace > Graph Trace (b 5 1) to move across the plot in Trace mode.

2. (Optional) To change the trace step increment for tracing, press b 5 3.

After you type a different step increment, the Graph Trace tool moves across the graph in steps of that size.

3. Use Graph Trace to explore a plot in the following ways:

• Move to a point and hover to move the trace cursor to that point.

• Press ¡or¢ to move from point to point on the function’s graph. The

coordinates of each point traced are displayed.

• Press £or¤ to move from one plot to another. The point’s coordinates

update to reflect the new location of the trace. The trace cursor is positioned on the point of the new graph or plot with the closest x value to the last point identified on the previously traced function or graph.

• Type a number and press · to move the trace cursor to the point on the plot

with independent coordinates nearest the typed value.

• Create a persistent point that remains on the graph by pressing · when the

trace point reaches the point you want to label. The point remains after you exit Graph Trace mode.

Using the Scratchpad 23

Notes:

• The string undef is displayed instead of a value when you move over a point

that is not defined for the function (a discontinuity).

• When you trace beyond the initially visible graph, the screen pans to show the

area being traced.

4. Press d or choose another tool to exit Graph Trace.

Finding Points of Interest

You can use the tools on the Analyze Graph menu to find a point of interest in a specified range of any graphed function. Choose a tool to find zero, the minimum or maximum, the point of intersection or inflection, or the numeric derivative (dy/dx) or Integral on the graph.

1. Select the point of interest that you want to find on the Analyze Graph menu. For example, to find a zero, press b 6 1.

non-CAS and

Exact Arithmetic

Zero

Minimum

Maximum

Intersection

Inflection Not applicable

dy/dx

Integral

Analyze Conics

The icon for the selected tool is displayed at the top left on the work area. Point to the icon to view a tooltip about how to use the selected tool.

2. Click the graph you want to search for the point of interest, and then click a second time to indicate where to start the search for the point.

The second click marks the lower bound of the search region and a dotted line is displayed.

Note: If you are finding the derivative (dy/dx), click the graph at the point (numeric

value) to use for finding the derivative.

3. Press ¡ or ¢ to move the dotted line that marks the search region, and then click the point at which you want to stop the search (upper bound of the search region).

b 6 1 b 6 1

b 6 2 b 6 2

b 6 3 b 6 3

b 6 4 b 6 4

b 6 5 b 6 6

b 6 6 b 6 7

b 6 7 b 6 8

CAS

b 6 5

24 Using the Scratchpad

4. Press · at the point to start the search. The tool shades the range.

If the search region you specified includes the point of interest, a label for the point is displayed. If you change a graph that has points of interest identified, be sure to check for changes in points of interest. For example, if you edit the function on the entry line or manipulate a plot, the point where the graph intersects zero can change.

The labeled points of interest remain visible on the graph. You can exit the tool by pressing d or choosing another tool.

Working with Variables in the Scratchpad

Scratchpad variables are shared between Scratchpad Calculate and Scratchpad Graph, but not with any TI-Nspire™ documents. If you use the same name for a Scratchpad variable and a variable in a document, no conflict occurs unless you attempt to copy expressions between documents and the Scratchpad.

Saving the Scratchpad Contents

You can save the Scratchpad Calculate page, the Scratchpad Graph page, or both as a TI-Nspire™ document.

1. Press ~, and then select Save to Document (~ A).

2. Press ·.

The Save to Document dialog box opens.

3. Select the page or pages to save.

Using the Scratchpad 25

+ 66 hidden pages