Texas Instruments TI-Nspire User Manual [de]
Getting Started with the
TI-Nspire™/
TI-Nspire™ CAS Handheld
This guidebook applies to TI-Nspire™ software version 3.2. To obtain the
latest version of the documentation, go to education.ti.com/guides.
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© 2006 - 2012 Texas Instruments Incorporated
ii
Contents
Important Information................................................................... ii
Getting Started with the TI-Nspire™ Handheld....................1
About CAS....................................................................................... 1
TI-Nspire™ Handheld Keys ............................................................ 2
Preparing the Handheld for Use ................................................... 3
Turn ing On t he TI-Ns pire™ Han dheld for the First Time............. 3
Using the TI-Nspire™ Touchpad .................................................... 5
Using the Home Screen.................................................................. 6
Understanding the Scratchpad...................................................... 9
The TI-Nspire™ Handheld Screen.................................................. 9
Using Hints.................................................................................... 10
Using the Scratchpad ............................................................11
Opening and Closing the Scratchpad.......................................... 11
Calculating with the Scratchpad ................................................. 12
Inserting Items from the Catalog ................................................ 13
Viewing the History...................................................................... 17
Editing Scratchpad Expressions ................................................... 18
Graphing with the Scratchpad .................................................... 19
Working with Variables in the Scratchpad ................................. 24
Saving the Scratchpad Contents.................................................. 24
Clearing Scratchpad Contents ..................................................... 25
Working with Documents on TI-Nspire™ Handhelds ..........27
Opening a Document................................................................... 27
Creating a New Document .......................................................... 28
Saving Documents ........................................................................ 29
Working with Applications .......................................................... 30
Using the Application Menu........................................................ 35
Context Menus ............................................................................. 37
Working with Problems and Pages ............................................. 37
Adding a Problem to a Document .............................................. 37
Viewing and Reordering Pages in a Document.......................... 38
Copying, Pasting, and Deleting Problems................................... 41
Renaming a Problem .................................................................... 42
Adding a Page to a Problem........................................................ 42
Moving Through Pages in a Document ...................................... 43
Managing Documents .................................................................. 43
Closing a Document ..................................................................... 47
iii
Understanding the TI-Nspire™ Tools...........................................47
Working with Images ........................................................... 53
Working with Images on a Handheld ......................................... 53
Working in a TI-Nspire™ Navigator™ Teacher Software
Classroom ....................................................................... 57
Logging In .....................................................................................57
Pausing a Class Session .................................................................58
Understanding File Transfers .......................................................58
Configuring Handhelds........................................................ 61
Installing the AAA Batteries.........................................................61
Replacing AAA Batteries .............................................................. 63
Inserting the TI-Nspire™ Rechargeable Battery .........................63
Checking Battery Status ............................................................... 65
Recharging the Handheld ............................................................ 65
Changing Handheld Settings ....................................................... 66
Changing the Preferred Language .............................................. 67
Customizing the Handheld Setup ................................................ 68
Customizing Document Settings.................................................. 69
Customizing Graphs & Geometry Settings .................................. 73
Viewing Handheld Status ............................................................. 75
Using Wireless Communication Hardware..................................76
Connecting Handhelds and Transferring Files.................... 79
Connecting Handhelds ................................................................. 79
Tra nsf err ing F iles t o a nd from Ha ndh e lds...... ....... ... ... ....... . ...... .. 80
Tra nsferring Files Bet ween Compu ters and Handhelds .. ........ ... 82
Handling Errors Resulting from Sending Folders........................84
Memory and File Management ........................................... 89
Checking Available Memory ........................................................ 89
Freeing Memory............................................................................ 90
Resetting the Memory.................................................................. 92
Updating the Handheld Operating System......................... 95
What You Need to Know .............................................................95
Finding Operating System Updates............................................. 96
Updating the Operating System.................................................. 97
Updating the OS on Multiple Handhelds..................................101
iv
OS Upgrade Messages ................................................................ 102
Using Keyboard Shortcuts..................................................107
Keyboard Shortcuts.................................................................... 107
Working in TI-84 Mode........................................................111
Understanding Dual-Mode Operation...................................... 111
TI-84 Plus Mode Cables .............................................................. 113
Capturing Screens in TI-84 Mode .............................................. 113
Upgrading the TI-84 Plus OS...................................................... 114
Appendix: Service and Support .........................................115
Battery Precautions .................................................................... 115
Tex as Instr uments S upport a nd Servic e..................................... 116
Service and Warranty Information............................................ 116
Index ....................................................................................117
v
vi
Getting Started with the TI-Nspire™
Handheld
The TI-Nspire™ handheld and the TI-Nspire™ CAS handheld are the
second generation handhelds in the TI-Nspire™ family of products. These
handhelds provide touchpad navigation, dynamic graphing, and
interactive computer features.
The handheld 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 both the TI-Nspire™ handheld and the TI-Nspire™ CAS
handheld. While they operate identically in many ways, there are a few
distinctions. If the TI-Nspire™ CAS handheld has additional functionality,
it is pointed out and the CAS operation is described.
About CAS
With CAS, or the Computer Algebra System, you can:
•Perform both symbolic and numeric calculations.
•Factor and expand expressions and solve for common denominators.
TI-Nspire™ CAS technology makes it possible to recognize, simplify, and
calculate math expressions, preserving the symbols including variables
and terms such as “e” and S.
This ability to enter and view equations and expressions on screen as they
appear in textbooks is especially useful for step-by-step, arithmetic,
algebraic, and calculus calculations.
Getting Started with the TI-Nspire™ Handheld 1
TI-Nspire™ Handheld Keys
Use the TI-Nspire™
Tou ch pa d as you
would a laptop
touchpad. You can also
press the outer edges
to move right, left, up,
and down.
e Moves to the
next entry field.
/ Provides access to
the function or
character shown
above each key. Also
enables shortcuts in
combination with
other keys.
c Tur ns o n th e
handheld. If the
handheld is on, this
key displays the home
screen.
~ Opens the
Document menu.
· Evaluates an
expression,
executes an
instruction, or
selects a menu
item.
g Makes the
next character typed
upper-case.
. Deletes the
previous character.
» Opens the
Scratchpad for
performing quick
calculations and
graphing.
d Removes menus
or dialog boxes from
the screen. Also stops
a calculation in
progress.
h Displays
stored variables.
b Displays the
application or
context menu.
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.
TI Nspire Touchpad
doc
2Getting Started with the TI-Nspire™ Handheld
Preparing the Handheld for Use
TI-Nspire™ handhelds are shipped with four alkaline AAA batteries and a
standard A male to mini B male USB cable. Handhelds can also be
powered using the TI-Nspire™ Rechargeable Battery or an approved wall
charger, which are sold separately.
Before using the handheld, either install the AAA batteries or install and
charge the TI-Nspire™ Rechargeable Battery (if purchased). You can also
connect your handheld to an external power source if you have the wall
charger.
Note: For more information about installing batteries, see Configuring
Handhelds.
Tur ni ng O n th e TI-Ns pi re ™ Handhel d fo r th e Fi rs t
Time
1. Ensure that batteries have been installed or charged, or that the
handheld is connected to a power source.
2. Press c to turn on the handheld.
A progress bar displays while the operating system loads, and then
you are prompted to choose preferences for language and font size.
To t urn the handheld off, press
contents are retained.
Note: For more information about installing and charging batteries, see
Configuring Handhelds.
/c. The settings and memory
Using Automatic Power Down™
To p rolong batter y life, the Aut omatic Po wer Dow n™ (APD™ ) featu re
turns off the handheld after three minutes of inactivity. When this
happens, press
document or menu accessed. To change the default setting, press
c to turn the handheld on and return to the last
c53 to access the Handheld Setup screen where you can
change the
Note: For more information about setting up the handheld, see
Configuring Handhelds.
Choosing a Language
After the OS is loaded, select a preferred language.
Power Standby setting.
Getting Started with the TI-Nspire™ Handheld 3
1. Press ¢ to open the drop-down list.
2. Press
3. Press
to scroll through the languages, and then press x or ·
to select a language.
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
2. Press
¢ to open the drop-down list.
to highlight the font size, and then press x or · to select
it.
4Getting Started with the TI-Nspire™ Handheld
3. Press e to highlight the OK button, and then press x or · to
save the selection and open the
Welcome! screen.
4. To continue, click
screen.
x or press · to select OK and open the Home
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.
•Press the arrow keys on the outside edge of the Touchpad to nudge
the mouse pointer up, down, left, or right, and then click x or
press
· to complete an action.
If you hold down an arrow key, the mouse pointer continues to move
in that direction.
Getting Started with the TI-Nspire™ Handheld 5
Note: If the mouse pointer is visible on a command or file, click or
x in the center of the Touchpad to select that command or file. If
tap
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 s ettings; to speed up or
slow down the pointer, or to enable tap to click. To change default
settings for the Touchpad see Configuring Handhelds.
Using the Home Screen
The Home screen opens when you power on your handheld for the first
time. 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: To return to the Home screen from any other location, press c.
Selecting Options on the Home Screen
•By default, the cursor is not active. To activate the cursor, swipe the
Touc hpad wit h your f ingertip .
•Use the Touchpad to click on any of the application icons or any of
the Scratchpad or Documents menu options.
•Press the arrows on the Touchpad (
options on the Home screen.
•Move the mouse pointer over each application icon to view a brief
description.
•Press
6Getting Started with the TI-Nspire™ Handheld
x or · to select a highlighted option, or press the number
or letter associated with the option.
, , ,or) to move among the
Adjusting the Contrast
To l ighten t he display, press an d hold / and tap -.
To d arken th e displ ay, press and hol d / and tap +.
Home Screen Options
Menu Option Purpose
Scratchpad
Use the Scratchpad menu options to open a Calculator or Graph
application without affecting your document.
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, press
Graph Opens the Scratchpad with a Graph application
active. From the Home screen, press
Documents
To s elect opt ions fo r workin g with documents, press the associated
number or use the Touchpad to select an icon then press
A.
B.
x or ·.
New
Document
My
Documents
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
Application icons
To a dd a new page to the curre nt docum ent, se lect an ap plicati on
icon. If no document is open, a new document opens with the
selected application on a new page.
Opens a new TI-Nspire™ document with available
applications listed.
Opens the file browser where you can open existing
TI-Nspire™ documents or send files to others.
settings.
Getting Started with the TI-Nspire™ Handheld 7
Menu Option Purpose
Calculator
Graphs
Geometry
Lists &
Spreadsheet
Data &
Statistics
Adds a page to a document for entering and
evaluating math expressions.
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.
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.
Notes
Provides text editing functions for adding text to
TI-Nspire™ documents for use as notes or to share
with other users.
Ver nie r
DataQuest™
Adds a page for collecting and analyzing data from
sensors or probes.
To l earn mor e about applic ations and documents, see the Working with
Documents on the TI-Nspire™ Handhelds.
8Getting Started with the TI-Nspire™ Handheld
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, please see Using the Scratchpad.
The TI-Nspire™ Handheld Screen
The icons on the handheld screen provide information about the status
of handheld operations and provide an easy way to access and change
settings. This screen shows the icons, which are described below.
Icon Function
À
Á
Â
Ã
Page scrolling arrows - Use the Touchpad and these
arrows to scroll through the pages in a document.
Page tabs - Indicate the problem number followed by
the page number. If problems are named, move the
Touc hpad poi nter ove r the ta b to vi ew the p age nam e.
Document name - Shows the current document name.
Click here to access the Documents menu. An asterisk by
the document name indicates changes were made since
the document was last saved.
Press to Test - Indicates that the handheld is in Press-to-
Tes t mode.
Getting Started with the TI-Nspire™ Handheld 9
Icon Function
Ä
Å
Login status - Shows whether the handheld is searching
for an access point (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.
g, /,or Ê status
Æ
Ç
Settings & Status:
•Hover the cursor over the icon to show the angle
mode setting in effect for the active application and
the status of the batteries.
•Click the icon to open the Settings menu.
Close document - Click here 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
•Some dialog boxes contain a question mark icon. Click this icon to
f To scrol l through t he Hints, use the Touchpad or arrow keys:
/ ¨.
open Hints for that task.
–To page down, press / 3.
–To page up, press
–To go to the end of the Hints file, press
–To go back to the beginning of the file, press
/ 9.
/ 1.
/ 7.
10 Getting Started with the TI-Nspire™ Handheld
Using the Scratchpad
The Scratchpad is a feature of the TI-Nspire™ handheld that lets you
quickly:
•Evaluate math expressions.
•Graph functions.
Opening and Closing the Scratchpad
f From the Home screen, press » to open the Scratchpad.
The first time you open the Scratchpad, a blank page opens with the
Calculator active.
f Press
» to alternate between the Calculate and Graph pages.
Using the Scratchpad 11
f 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.
f Press
d to close the Scratchpad.
Calculating with the Scratchpad
From the Scratchpad Calculate page, type a math expression on the entry
line, and then press
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.
· to evaluate the expression. Expressions are
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
3. Press
2 l 8 to begin the expression.
¢ to return the cursor to the baseline, and then complete the
expression by typing:
r 43 p 12
4. Press · to evaluate the expression.
The expression displays in standard mathematical notation, and the
result displays on the right side of the page.
Note: You can force a decimal approximation in a result by pressing
/
· instead of ·.
12 Using the Scratchpad
Note: Results formatting can also be adjusted in settings. For more
Pressing
/
· forces the approximate
result.
Catalog
for a nonCAS
handheld
Catalog for
a CAS
handheld
information about customizing settings, see Configuring Handhelds.
Inserting Items from the Catalog
You c an u se th e Ca tal og t o in se rt f unctions 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.
Using the Scratchpad 13
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
c) Click a numbered tab to list functions by category: math functions,
d) Press
¤ or £ as necessary to highlight the item you are inserting.
symbols, math templates, library objects, and value for standard
measurement units (CAS).
· to insert the item into the entry line.
Using an Expression Template
Tem plates h elp you enter matri ces, piecewise functions, systems of
equations, integrals, derivatives, products, and other math expressions.
For example, suppose you want to evaluate
1. Press
2. Select to insert the algebraic sum template.
t to open the Template palette.
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
14 Using the Scratchpad
· to evaluate the expression.
Inserting Expressions Using a Wizard
LinRegMx
function in a
non-CAS
handheld
You c an u se a wi za rd t o si mpl if y ent ering 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
2. Click inside the list, and then press
3. Press
4. If the
5. Press · to change the setting.
6. Press
k1 to open the Catalog and show the alphabetic list of
functions.
begin with “L.”
¤ as necessary to highlight LinRegMx.
Wizards On option is not checked, press ee to highlight
Wizards On.
ee to highlight LinRegMx again.
L to jump to the entries that
Using the Scratchpad 15
7. Press ·.
LinRegMx
function in a
CAS
handheld
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 List.
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.
16 Using the Scratchpad
LinRegMx {1,2,3,4,5},{5,8,11,14,17},1: CopyVar stat.RegEqn,f1:
stat.results
The Scratchpad then displays the stat.results variables.
Note: You can copy values from the stat.results 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.
f Press
À
£ or ¤ to scroll through the history.
Current entry/total entries
Using the Scratchpad 17
Copying a History Item to the Entry Line
You c an q ui ck ly co py a n ex pre ss io n, subexpression, or result from the
history into the entry line.
1. Press
2. Optionally, select part of the expression or result by using
3. Press
£ or ¤ to move through the history and select the item that
you want to copy.
g in
combination with the arrow keys.
· 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.
f From the
—or—
Actions menu, click Clear History.
b 1 5.
Press
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.
18 Using the Scratchpad
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 c an de le te , c ut , or c op y a selected part of an expression.
1. Press
2. Press and hold
¡, ¢, £, or ¤ to move the cursor to a starting point in the
expression.
g and press ¡, ¢, £, or ¤ to select.
–To delete the selection, press
–To cut the selection to the Clipboard, press
–To copy the selection to the Clipboard, press
–To paste the selection to a new entry line in Scratchpad, press
..
/X.
/C.
/V.
Graphing with the Scratchpad
1. Press » to open the Scratchpad Graph page if it’s 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
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
Equation > Circle > (x-h)
Ctrl + G or press b23 to
b > Graph Entry/Edit >
2
+ (y-k)2 = r
2
or press
b3231. Fill in the equation and press · to
draw the circle.
•To graph a function, press
press b31.
b > Graph Entry/Edit > Function or
Using the Scratchpad 19
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
5. Use the
· to graph the relation, or press ¤ to add another relation.
If necessary, you can use press b4 to choose a tool on the
Window/Zoom
When you graph the relation, the entry line disappears to show an
uncluttered view of the graph. If you select or trace a plot, relation
that defines the plot is displayed on the entry line. Yo u ca n m od if y 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.
menu and adjust the viewing area.
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.
Viewing the Table
f To display a tab le of val ues corr esponding to the current plots, press
b > Table > Split-screen Table (b71).
press
20 Using the Scratchpad
f To hide the ta ble, clic k the grap h side of the split screen, and then
b > Table > Remove Table (b72).
press
f To resize col umns, cli ck the t able and press b > Actions > Resize
(b11).
f To dele te a co lumn, ed it a n e xpres sion, or edit table settings, click the
table and press
b > Table (b2).
Changing the Appearance of the Axes
As you work with graphs, the Cartesian axes are displayed by default.
You c an ch an ge t he a ppe ar an ce of t he a xe s in t he f ol lo wi ng wa ys :
1. Press
2. Select the axes and press
3. Adjust the axes scale and tic mark spacing manually.
4. Change axis end values by double-clicking them and typing new
5. Adjust the location of the axes. To move the existing axes without
6. Change the axes’ scales by pressing
b4 and choose the Zoom tool.
/b2 to activate the Attributes
tool.
a) Press
b) Press
c) Change any other attributes of the axes as required for your work,
a) Click and hold one tick mark, and move it on the axis. The spacing
b) To adjust the scale and tic mark spacing on a single axis, press and
values.
resizing or rescaling them, click in and drag an empty region of the
screen until the axes are in the desired location.
£ or ¤ to move to the attribute to change. For example,
choose the end style attribute.
¡ or ¢ to choose the style to apply.
and then press · to exit the attributes tool.
and number of tic marks increases (or decreases) on both axes.
g, and then grab and drag a tic mark on that axis.
hold
b > Window/Zoom > Window
Settings (
Type the val ues of y our choi ce over the current values for x-min,
x-max, y-min, and y-max, Xscale, and Yscale and click
b41).
OK.
7. Press b > View > Hide Axes (b21) to hide or show the
axes.
•If the axes are shown on the page, selecting this tool hides them.
Using the Scratchpad 21
•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
2. (Optional) To change the trace step increment for tracing, press
b > Trace > Graph Trace (b51) to move across the
plot in Trace model.
b53.
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
•Type a number and press · to move the trace cursor to the
22 Using the Scratchpad
£ 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.
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.
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 c an u se t he t oo ls on t he 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
Graph
menu. For example, to find a zero, press b61..
non-CAS CAS
Zero
Minimum
Maximum
Intersection
Inflection Not applicable
dy/dx
Integral
Analyze Conics
b61 b61
b62 b62
b63 b63
b64 b64
b65
b65 b66
b66 b67
b67 b68
Analyze
The icon for the selected tool displays 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.
Using the Scratchpad 23
The second click marks the lower bound of the search region and a
dotted line displays.
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
4. Press · at the point to start the search. The tool shades the range.
¡ 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).
If the search region you specified includes the point of interest, a
label for the point displays. 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 c an s ave t he S cr at ch pa d Cal cu la te p ag e, t he Sc ra tc hp ad G ra ph pa ge ,
or both as a TI-Nspire™ document.
1. Press
24 Using the Scratchpad
~, and then select Save to Document (~A).
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