Introduction

The c is a powerful educational tool designed for advanced mathematics and science applications. Featuring a high-resolution color display and a built-in Computer Algebra System (CAS), it allows users to perform symbolic calculations, solve equations, and visualize complex functions with ease. Its rechargeable battery and user-friendly interface make it ideal for students from middle school through college. The Nspire CX CAS is priced at approximately $149.99, offering exceptional functionality for academic success

Detailed Specifications

Feature	Specification
Model	Nspire CX CAS
Type	Graphing Calculator
Display	Full-color backlit display
Display Size	320 x 240 pixels
Screen Type	LCD with touchscreen
Dimensions	7.5 x 3.2 x 0.9 inches (19.1 x 8.1 x 2.3 cm)
Weight	Approximately 1.2 lbs (0.54 kg)
Battery	Rechargeable lithium-ion
Battery Life	Up to 2 weeks on a single charge
Memory	100 MB user memory; 64 MB RAM
Processor	ARM9 processor
Operating System	TI-Nspire OS
CAS (Computer Algebra System)	Yes (symbolic algebra capabilities)
Functionality	Algebra, calculus, statistics, geometry, and more
Graphing Capabilities	2D and 3D graphing, parametric equations, polar graphs
Data Analysis	Statistical analysis tools, data plotting
Connectivity	USB, TI-Nspire software compatibility, TI Connectivity Kit
Educational Software	Includes built-in software for various subjects
Programming	Supports TI-BASIC and Python programming
Language Support	Multiple languages supported
Accessories	USB cable, user manual
Certifications	Approved for use on standardized tests in many states

Description

We have prioritized usability in the development of the Texas Instruments Nspire Graphing Calculator CX CAS. Its user-friendly interface facilitates the navigation of a variety of applications and functions. Especially in low-light conditions, the calculator's full-color illuminated display improves visibility and readability. The 3D graphing capability enables users to rotate and zoom in on graphs, thereby facilitating a more profound comprehension of mathematical concepts.

By utilizing the CAS functionality, users can perform sophisticated mathematical operations, including the symbolic determination of equation roots, the factoring of polynomials, and the solution of differential equations. As a result, it is an essential resource for professionals and students who are addressing intricate mathematical issues.

Empty (Void) Elements

When analyzing real-world data, you might not always have a complete data set. TI-Nspire CAS Software allows empty, or void, data elements so you can proceed with the nearly complete data rather than having to start over or discard the incomplete cases.
You can find an example of data involving empty elements in the Lists & Spreadsheet chapter, under “Graphing spreadsheet data.”
The delVoid() function lets you remove empty elements from a list. The isVoid() function lets you test for an empty element.

Note: To enter an empty element manually in a math expression, type “_” or the keyword void. The keyword voidis automatically converted to a “_” symbol when the expression is evaluated. To type “_” on the handheld, press /_.

Calculations involving void elements

The majority of calculations involving a void input will produce a void result. See special cases below.

List arguments containing void elements

The following functions and commands ignore (skip) void elements found in list arguments.
count, countIf, cumulativeSum, freqTable►list, frequency, max, mean, median, product, stDevPop, stDevSamp, sum, sumIf, varPop, and varSamp, as well as regression calculations, OneVar, TwoVar, and FiveNumSummary statistics, confidence intervals, and stat tests

SortA and SortD move all void elements within the first argument to the bottom

List arguments containing void elements

In regressions, a void in an X or Y list introduces a void for the corresponding element of the residual.
An omitted category in regressions introduces a void for the corresponding element of the residual.
A frequency of 0 in regressions introduces a void for the corresponding element of the residual.

TI-Nspire CX II - TI-Basic Programming Features

Auto-indentation in Programming Editor
The TI-Nspire program editor now auto-indents statements inside a block command. Block commands are If/EndIf, For/EndFor, While/EndWhile, Loop/EndLoop, Try/EndTry
The editor will automatically prepend spaces to program commands inside a block command. The closing command of the block will be aligned with the opening command.
The example below shows auto-indentation in nested block commands.

auto-indentation_in_programming_editor_texas_instruments_nspire_graphing_calculator_cx_cas.png

Code fragments that are copied and pasted will retain the original indentation.
Opening a program created in an earlier version of the software will retain the original indentation.

Improved Error Messages for TI-Basic

Errors

Error Condition	New message
Error in condition statement (If/While)	A conditional statement did not resolve to TRUE or FALSE NOTE: With the change to place the cursor on the line with the error, we no longer need to specify if the error is in an "If" statement or a "While" statement.
Missing EndIf	Expected EndIf but found a different end statement
Missing EndFor	Expected EndFor but found a different end statement
Missing EndWhile	Expected EndWhile but found a different end statement
Missing EndLoop	Expected EndLoop but found a different end statement

Error Condition	New message
Missing EndTry	Expected EndTry but found a different end statement
“Then” omitted after If <condition>	Missing If..Then
“Then” omitted after ElseIf <condition>	Then missing in block: ElseIf.
When “Then”, “Else” and “ElseIf” were encountered outside of control blocks	Else invalid outside of blocks: If..Then..EndIf or Try..EndTry
“ElseIf” appears outside of “If..Then..EndIf” block	ElseIf invalid outside of block: If..Then..EndIf
"Then” appears outside of “If.... EndIf” block	Then invalid outside of block: If..EndIf

Syntax Errors
In case commands that expect one or more arguments are called with an incomplete list of arguments, a “Too few argument error” will be issued instead of “syntax” error

syntax_errors_of_texas_instruments_nspire_graphing_calculator_cx_cas.png

Note: When an incomplete list of arguments is not followed by a comma, the error message is: “too few arguments”. This is the same as previous releases.

Constants and Values

The following table lists the constants and their values that are available when performing unit conversions. They can be typed in manually or selected from the

Constants list in Utilities > Unit Conversions (Handheld: Press k 3).

Constant	Name	Value
_c	Speed of light	299792458 _m/_s
_Cc	Coulomb constant	8987551787.3682 _m/_F
_Fc	Faraday constant	96485.33289 _coul/_mol
_g	Acceleration of gravity	9.80665 _m/_s2
_Gc	Gravitational constant	6.67408E-11 _m3/_kg/_s2
_h	Planck's constant	6.626070040E-34 _J _s
_k	Boltzmann's constant	1.38064852E-23 _J/_¡K
_m0	Permeability of a vacuum	1.2566370614359E-6 _N/_A2
_mb	Bohr magneton	9.274009994E-24 _J _m2/_Wb
_Me	Electron rest mass	9.10938356E-31 _kg
_Mm	Muon mass	1.883531594E-28 _kg
_Mn	Neutron rest mass	1.674927471E-27 _kg
_Mp	Proton rest mass	1.672621898E-27 _kg
_Na	Avogadro's number	6.022140857E23 /_mol
_q	Electron charge	1.6021766208E-19 _coul
_Rb	Bohr radius	5.2917721067E-11 _m
_Rc	Molar gas constant	8.3144598 _J/_mol/_¡K
_Rdb	Rydberg constant	10973731.568508/_m
_Re	Electron radius	2.8179403227E-15 _m
_u	Atomic mass	1.660539040E-27 _kg
_Vm	Molar volume	2.2413962E-2 _m3/_mol
_H0	Permittivity of a vacuum	8.8541878176204E-12 _F/_m
_s	Stefan-Boltzmann constant	5.670367E-8 _W/_m2/_¡K4
_f0	Magnetic flux quantum	2.067833831E-15 _Wb

Setup Guide

To set up the Texas Instruments Nspire Graphing Calculator CX CAS,

Start by charging the battery using the provided USB cable.
Once charged, turn on the calculator by pressing the power button located at the top right corner. Follow the on-screen instructions to set the language, date, and time.
For pairing with other devices or computers, connect the calculator via USB and install the TI-Nspire software from the official Texas Instruments website.
This software allows for data transfer, software updates, and synchronization of documents between the calculator and your computer.

Error Codes and Messages

When an error occurs, its code is assigned to variable errCode. User-defined programs and functions can examine errCode to determine the cause of an error. For an example of using errCode, See Example 2 under the Try command, page 191.
B: Some error conditions apply only to TI-Nspire™ CAS products, and some apply only to TI-Nspire™ products.

Error code	Description
10	A function did not return a value
20	A test did not resolve to TRUE or FALSE. Generally, undefined variables cannot be compared. For example, the test If a<b will cause this error if either a or b is undefined when the If statement is executed.
30	Argument cannot be a folder name.
40	Argument error
50	Argument mismatch Two or more arguments must be of the same type.
60	Argument must be a Boolean expression or integer
70	Argument must be a decimal number
90	Argument must be a list
100	Argument must be a matrix
130	Argument must be a string
140	Argument must be a variable name. Make sure that the name: does not begin with a digit does not contain spaces or special characters does not use underscore or period in invalid manner does not exceed the length limitations See the Calculator section in the documentation for more details.
160	Argument must be an expression
165	Batteries too low for sending or receiving Install new batteries before sending or receiving.
170	Bound The lower bound must be less than the upper bound to define the search interval.

180	Break The dor c key was pressed during a long calculation or during program execution.
190	Circular definition This message is displayed to avoid running out of memory during infinite replacement of variable values during simplification. For example, a+1->a, where a is an undefined variable, will cause this error.
200	Constraint expression invalid For example, solve(3x^2-4=0,x) \| x<0 or x>5 would produce this error message because the constraint is separated by “or” instead of “and.”
210	Invalid Data type An argument is of the wrong data type.
220	Dependent limit
230	Dimension A list or matrix indexis not valid.For example, if the list {1,2,3,4} is storedin L1, then L1[5] is a dimension error because L1 onlycontains fourelements.
235	Dimension Error. Not enough elements in the lists.
240	Dimension mismatch Two or more arguments must be of the same dimension. For example, [1,2]+[1,2,3] is a dimension mismatch because the matrices contain a different number of elements.
250	Divide by zero
260	Domain error An argument must be in a specified domain. For example, rand(0) is not valid.
270	Duplicate variable name
280	Else and ElseIf invalid outside of If...EndIf block
290	EndTry is missing the matching Else statement
295	Excessive iteration
300	Expected 2 or 3-element list or matrix
310	The first argument of nSolve must be an equationin a singlevariable. It cannotcontain a non- valued variable otherthan the variable of interest.
320	First argument of solve or cSolve must be an equation or inequality For example, solve(3x^2-4,x) is invalid because the first argument is not an equation.

345	Inconsistent units
350	Index out of range
360	Indirection string is not a valid variable name
380	Undefined Ans Either the previous calculation did not create Ans, or no previous calculation was entered.
390	Invalid assignment
400	Invalid assignment value
410	Invalid command
430	Invalid for the current mode settings
435	Invalid guess
440	Invalid implied multiply For example, x(x+1) is invalid; whereas, x*(x+1) is the correct syntax. This is to avoid confusion between implied multiplication and function calls.
450	Invalid in a function or current expression Only certain commands are valid in a user-defined function.
490	Invalid in Try..EndTry block
510	Invalid list or matrix
550	Invalid outside function or program A number of commands are not valid outside a function or program. For example, Local cannot be used unless it is in a function or program.
560	Invalid outside Loop..EndLoop, For..EndFor, or While..EndWhile blocks For example, the Exit command is valid only inside these loop blocks.
565	Invalid outside program
570	Invalid pathname For example, \var is invalid.
575	Invalid polar complex
580	Invalid program reference Programs cannotbe referenced withinfunctions or expressions such as 1+p(x)where p is a program.

600	Invalid table
605	Invalid use of units
610	Invalid variable name in a Local statement
620	Invalid variable or function name
630	Invalid variable reference
640	Invalid vector syntax
650	Link transmission A transmission between two units was not completed. Verify that the connecting cable is connected firmly to both ends.
665	Matrix not diagonalizable
670	Low Memory Delete some data in this document Save and closethis document If 1 and 2 fail, pull out and re-insert batteries
672	Resource exhaustion
673	Resource exhaustion
680	Missing (
690	Missing )
700	Missing “
710	Missing ]
720	Missing }
730	Missing start or end of block syntax
740	Missing Then in the If..EndIf block
750	Name is not a function or program
765	No functions selected
780	No solution found
800	Non-real result For example, if the software is in the Real setting, √(-1) is invalid.

	To allow complex results, change the “Real or Complex” Mode Setting to RECTANGULAR or POLAR.
830	Overflow
850	Program not found A program reference inside another program couldnot be foundin the provided path during execution.
855	Rand type functions not allowed in graphing
860	Recursion too deep
870	Reserved name or system variable
900	Argument error Median-median model could not be applied to data set.
910	Syntax error
920	Text not found
930	Too few arguments The function or command is missing one or more arguments.
940	Too many arguments The expression or equation contains an excessive number of arguments and cannot be evaluated.
950	Too many subscripts
955	Too many undefined variables
960	Variable is not defined No value is assigned to variable. Use one of the following commands: sto → := Define to assign values to variables.
965	Unlicensed OS
970	Variable in use so references or changes are not allowed
980	Variable is protected
990	Invalid variable name Make sure that the name does not exceed the length limitations

1000	Window variables domain
1010	Zoom
1020	Internal error
1030	Protected memory violation
1040	Unsupported function. This function requires Computer Algebra System. Try TI-Nspire™ CAS.
1045	Unsupported operator. This operator requires Computer Algebra System. Try TI-Nspire™ CAS.
1050	Unsupported feature. This operator requires Computer Algebra System. Try TI-Nspire™ CAS.
1060	Input argument must be numeric. Only inputs containing numeric values are allowed.
1070	Trig function argument too big for accurate reduction
1080	Unsupported use of Ans.This application does not support Ans.
1090	Function is not defined. Use one of the following commands: Define := sto → to define a function.
1100	Non-real calculation For example, if the software is in the Real setting, √(-1) is invalid. To allow complex results, change the “Real or Complex” Mode Setting to RECTANGULAR or POLAR.
1110	Invalid bounds
1120	No sign change
1130	Argument cannot be a list or matrix
1140	Argument error The first argument must be a polynomial expression in the second argument. If the second argument is omitted, the software attempts to select a default.
1150	Argument error The first two arguments must be polynomial expressions in the third argument. If the third argument is omitted, the software attempts to select a default.
1160	Invalid library pathname

	A pathname must be in the form xxx\yyy, where: The xxx part can have 1 to 16 characters. The yyy part can have 1 to 15 characters. See the Library section in the documentation for more details.
1170	Invalid use of library pathname A value cannot be assigned to a pathname using Define, :=, or sto →. A pathname cannot be declared as a Local variable or be used as a parameter in a function or program definition.
1180	Invalid library variable name. Make sure that the name: Does not contain a period Does not begin with an underscore Does not exceed 15characters See the Library section in the documentation for more details.
1190	Library document not found: Verify library is in the MyLib folder. Refresh Libraries. See the Library section in the documentation for more details.
1200	Library variable not found: Verify library variable exists in the first problem in thelibrary. Make sure library variable has been defined as LibPub or LibPriv. Refresh Libraries. See the Library section in the documentation for more details.
1210	Invalid library shortcut name. Make sure that the name: Does not contain a period Does not begin with an underscore Does not exceed 16characters Is not a reserved name See the Library section in the documentation for more details.
1220	Domain error: The tangentLine and normalLine functions support real-valued functions only.
1230	Domain error.

	Trigonometric conversion operators are not supported in Degree or Gradian angle modes.
1250	Argument Error Use a system of linear equations. Example of a system of two linear equations with variables x and y: 3x+7y=5 2y-5x=-1
1260	Argument Error: The first argument of nfMin or nfMax must be an expression in a singlevariable. It cannot contain a non-valued variable otherthan the variable of interest.
1270	Argument Error Order of the derivative must be equal to 1 or 2.
1280	Argument Error Use a polynomial in expanded form in one variable.
1290	Argument Error Use a polynomial in one variable.
1300	Argument Error The coefficients of the polynomial must evaluate to numeric values.
1310	Argument error: A function could not be evaluated for one or more of its arguments.
1380	Argument error: Nested calls to domain() function are not allowed.

Warning Codes and Messages

You can use the warnCodes() function to store the codes of warnings generated by evaluating an expression. This table lists each numeric warning code and its associated message.

Warning code	Message
10000	Operation might introduce false solutions.
10001	Differentiating an equation may produce a false equation.
10002	Questionable solution
10003	Questionable accuracy
10004	Operation might lose solutions.
10005	cSolve might specify more zeros.
10006	Solve may specify more zeros.
10007	More solutions may exist. Try specifying appropriate lower and upper bounds and/or a guess. Examples using solve(): solve(Equation, Var=Guess)\|lowBound<Var<upBound solve(Equation, Var)\|lowBound<Var<upBound solve(Equation, Var=Guess)
10008	Domain of the result might be smaller than the domain of the input.
10009	Domain of the result might be larger than the domain of the input.
10012	Non-real calculation
10013	∞^0 or undef^0 replaced by 1
10014	undef^0 replaced by 1
10015	1^∞ or 1^undef replaced by 1
10016	1^undef replaced by 1
10017	Overflow replaced by ∞ or −∞
10018	Operation requires and returns 64 bit value.
10019	Resource exhaustion, simplification might be incomplete.
10020	Trig function argument too big for accurate reduction.
10021	Input contains an undefined parameter. Result might not be valid for all possible parameter values.

10022	Specifying appropriate lower and upper bounds might produce a solution.
10023	Scalar has been multiplied by the identity matrix.
10024	Result obtained using approximate arithmetic.
10025	Equivalence cannot be verified in EXACT mode.
10026	Constraint might be ignored. Specify constraint in the form "\" 'Variable MathTestSymbol Constant' or a conjunct of these forms, for example 'x<3 and x>-12'

Texas Instruments Nspire Graphing Calculator CX CAS Troubleshooting

Battery Drain
- Ensure the calculator is properly charged.
- Close unnecessary applications to conserve battery life.
Software Glitches
- Restart the calculator to resolve minor issues.
- Perform a software reset through the settings menu.
Connectivity Problems
- Check that the USB cable is securely connected to both the calculator and the computer.
- Ensure that the TI-Nspire software is up-to-date and properly installed.
Additional Resources
- Refer to the user manual for troubleshooting guides.
- Visit the Texas Instruments support website for further assistance.

Pros & Cons

Pros

Advanced CAS Capabilities: Solves equations symbolically and performs advanced mathematical operations.
Color Display: High-resolution color screen for vivid graphing and enhanced visibility.
3D Graphing: Visualize complex functions in three dimensions.
Statistical Analysis: Comprehensive set of statistical functions for data analysis.
Rechargeable Battery: Environmentally friendly and cost-effective.

Cons

Cost: Pricier compared to other graphing calculators without CAS capabilities.
Complexity: Steep learning curve due to advanced features.
Software Updates: Requires periodic software updates to maintain functionality.
Battery Life: Battery life can be short if not managed properly.

Customer Reviews

Customers generally praise the Texas Instruments Nspire Graphing Calculator CX CAS for its powerful features and user-friendly interface. Many reviewers highlight its ability to handle complex mathematical tasks with ease, making it an essential tool for students in advanced math and science classes. However, some users have noted that the calculator can be quite expensive and that the battery life could be improved.

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