Solution 36976: When attempting to enable Press-to-Test while the TI-84 Plus CE™ is connected to another device (computer/probe) may result in unexpected behavior
...ress-to-Test mode (either world wide/French P2T or Singapore Press to Reset) setup screen (by turning the calculator OFF and then pressing the appropriate key presses)At this point observe the behaviorACTUAL RESULTS:For Singapore Press-to-Reset the Graphing Calculator bypasses the Setup screen wh...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/36976
Solution 34849: Resolving the Error "Unable to Complete the Transfer" or "USB Communication Error: Multiple Files Matched" on the TI-84 Plus Family of Graphing Calculators.
...message "Unable to complete the transfer" may be displayed. This error message is an indication that one or more flash applications or application variables with the same name already exists. To resolve this issue, manually back up all files and upgrade to the latest TI-84 Plus Family operating ...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34849
Solution 11521: Installing New TI Key Fonts on a Windows® Computer.
...e and when prompted click "Browse" select Desktop and click "OK" then "Unzip". • Next press and hold the [Windows] key and press [R] to open the run dialog. Alternatively you can click [Start] and then [Run].• In the run dialog copy and paste the text listed below:%WINDIR%\Fonts • After copying a...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/11521
Solution 22590: TI-Nspire™ Handheld in TI-84 Plus Mode Not Capable of Connecting to TI-Nspire Computer Link or TI Connect-to-Class™ Teacher Software.
...TI-Nspire handheld in TI-84 Plus mode (with the TI-84 Plus Keypad inserted), communication between the handheld and computer can only be established via the TI-Connect software. Using the TI Connect software and TI-Nspire handheld in TI-84 Plus mode, the user can send and receive data, backup th...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/22590
Solution 21911: nDeriv and Derivative Commands Use Different Algorithms to Compute Answers.
...the nDeriv() command uses the following formula: (f(var+step) - f(var-step))/(2*step) Please Note: On the TI-86, replace 'step' with the tolerance variable. In general, the derivative command is more accurate than the nDeriv command with the default step/tolerance (.001 by default). Solution 219...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/21911
Solution 13680: Finding Proper Fractions and Common Denominators on the TI-89, TI-89 Titanium, TI-92 Family or Voyage™ 200 Graphing Calculators.
...e the propFrac ([F2] 7) and comDenom ([F2] 6) functions. The syntax for the expressions is as follows: propFrac (rational expression [,var]) - the variable is with respect to a proper fraction. comDenom (expression [,var]) - the var is for common denominators that collect similar powers of this v...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/13680
Solution 11726: Computing the Doolittle LU (lower-upper) Decomposition of a Matrix on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.
... [A-LOCK] [,] [2ND] [A-LOCK].• Press [P] [E] [R] [M] [ENTER].• Press [2ND] [VAR-LINK] and locate lower.• Press [ENTER] [ENTER] to display the lower triangular matrix.• Press [2ND] [VAR-LINK] and locate upper.• Press [ENTER] [ENTER] to display the upper triangular matrix.• Press [2ND] [VAR-LINK] a...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/11726
Solution 11725: Computing the Cross Product on the TI-89 Family and Voyage™ 200 Graphing Calculators.
...r Example: Find the cross product of vectors and 1) Turn the calculator ON and on the TI-89 Family press [HOME] and on the Voyage 200 press [Green Diamond][Q] (CALC HOME). 2) Press [2nd] [5], select 4:Matrix and press the [right arrow] key 3) Press [ALPHA] [L] and select 2:crossP( and press [EN...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/11725
Solution 23891: Setting Constraints to Remove the @n Symbol From a Trigonometric Equation Using the Solve Command on TI-89 Family, TI-92 Plus Family and the Voyage™ 200.
...ser must restrict the equation to show only one revolution of a circle. This is done one of two ways depending on whether the unit is in degree or radian mode. Please see the below example: 1) For radian mode use the restriction x>0 and x0 and x0 and x<360 Please see the TI-89 family, TI-92 ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/23891
Solution 11775: Inserting Comments in a TI Basic Program on the TI-89 Family, TI-92 Family, and Voyage™ 200.
...am comment. Any information to the right of the © symbol will not be executed when the program runs.The © symbol can be access by pressing the green diamond [♦] key and then the close parenthesis [ ) ] key while editing a program, or from the CATALOG menu.Below is an example program using the © s...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/11775
Solution 24995: Answers that Include an @1 or a Component Formatted as @k on the TI-89 Family, TI-92 Family, or Voyage™ 200
... representation, in the same or another problem, is listed as @2 and the next iterations will show as @3,@4....@k. The equation below is a slight variation on the command above: solve(x^2+y^2=r^2 and (2x-r)^2+y^2=r^2,{x,y,z}) and the answer is x=r/3 and y=(2*square root of 2*r)/3 and z=@2 or x=r...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/24995
Solution 10215: Polynomial Root Finder and Simultaneous Equation Solver App gives Unexpected Result for the TI-83/84 Plus, TI-89/TI-92/Voyage 200 and the TI-85/TI-86 families of the Graphing line of Calculators.
... Home | Other Graphing Calculator products Knowledge Base Knowledge Base Search Why do I receive unexpected complex results when using the Polynomial Root Finder and Simultaneous Equation Solver Application? The following explains why complex results are ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/10215
Solution 10403: Symbolic Manipulation Capabilities of the TI-85 when Computing Derivatives.
...r software applications (Apps). Like the TI-85, the TI-89 Titanium is ideal for advanced mathematics classes like calculus, engineering, and differential equations. The TI-89 Titanium is electronically upgradeable, includes symbolic manipulations, 3D graphing, statistics, and more! The TI-Nspire ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/10403
Solution 11837: Difference Between Complex Numbers on the TI-89 Family, TI-92 Family, or Voyage™ 200 Graphing Calculators.
...d the TI-89 family/TI-92 Plus/Voyage 200 differ in the way polar form complex numbers are handled. The TI-92 accepts the form r*eiq and must be in radian mode. If entering a degree value, the degree symbol must be used. The q value in the result would be a radian measure, and it must be manually ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/general-information/11837
Solution 11374: Compatibility Between TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators Data and Programs.
...reen sizes and keyboards. Compared to a TI-92, the TI-89, TI-89 Titanium, TI-92 Plus, or Voyage 200: 1) Have functions, instructions, and system variables that do not exist on the TI-92. 2) Can use the same variable to define and then evaluate a user-defined function or program. For example, a ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/general-information/11374
Solution 12078: Comparison Between the TI-89 Titanium and the TI-89.
... TI-89 Titanium and the TI-89? The TI-89 Titanium is compatible, keystroke for keystroke, with the TI-89. Calculator files (Apps, data, programs, variables, etc.) can be transferred between these two models. The TI-89 Titanium offers 3 times the memory of the TI-89 for Calculator Software Appl...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/general-information/12078
Solution 12135: Error Invalid Polar Complex on the TI-89 Family, TI-92 Plus and Voyage™ 200.
...w for inputting polar complex numbers. Complex numbers can be entered in two different polar forms.• reiq - Must be entered with the calculator in Radian mode. Inputting polar complex numbers while the calculator is in degree mode will trigger error messages to be displayed.• rÐq - Must be entere...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/12135
Solution 40442: Texas Instruments Computer Algebra System (CAS) Calculators Produce an Unexpected Derivative Result for Function Defined with Constant.
...evaluating fss(k) substitutes k giving the unexpected result. You can workaround this behavior by using the with "|" command to assign a different variable: Define f(x)=x^3-3k^2*x Define fss(x)=derivative(f(z),z,2)|z=x fss(x) = 6x fss(k) = 6k Solution 40442: Texas Instruments Computer Algebra S...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/40442
Solution 12300: Calculating 2-Variable Statistics on the TI-36X Solar Scientific Calculator.
... Home | Scientific, elementary & basic calculators Knowledge Base Knowledge Base Search How do I compute 2-variable statistics on the TI-36X Solar? To perform 2-variable statistics on the TI-36X Solar scientific calculator, please refer to the ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12300
Solution 34772: Computing Net Present Value (NPV) and Internal Rate of Return (IRR) on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...RR on the TI-83 Plus and TI-84 Plus family of graphing calculators? The following examples will demonstrate how to compute NPV and IRR. Example: Initial cash flow is -9 Interest rate is 7% CF1 = 5 Frequency = 2 CF2 = -4 Frequency = 3 CF3 = 6 Frequency = 5 What is the NPV and IRR? Solution: First...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34772
Solution 12161: String Commands on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.
... Family, and Voyage 200 graphing calculators? The following are the different string commands and their meaning: # - Converts a string into a variable name. This is called indirection. & - Appends or concatenate two strings into one string. char - Returns the character that correspon...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12161
Periodic Table
This StudyCards™ stack enables students to review the terms associated with learning and using the Periodic Table of the Elements.https://education.ti.com/en/activity/detail/periodic-table
Number to Element
This StudyCards™ stack enables students to practice associating the chemical number of an element to the element's name.https://education.ti.com/en/activity/detail/number-to-element
Variety is the Spice of Life
In this activity, students will collect data on all members of the class. They will make a graph of the data collected, interpret variations, and then draw conclusions.https://education.ti.com/en/activity/detail/variety-is-the-spice-of-life
Vernier - Enzyme Action: Testing Catalase Activity
Students will use an O2 Gas Sensor to measure the amount of O2 produced when H2O2 is broken down by the enzyme catalase at different concentrations, pH values, and temperatures. They will also measure the enzyme's initial reaction rates.https://education.ti.com/en/activity/detail/vernier--enzyme-action-testing-catalase-activity