Texas Instruments TI-84 Plus T Getting Started
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Texas Instruments TI-84 Plus T Getting Started

Texas Instruments TI-84 Plus T Getting Started

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Getting Started with the
TI-84 Plus T
Graphing Calculator
This guidebook applies to software version 5.1. To obtain the latest version of the
documentation, go to education.ti.com/go/download.

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  • Page 1 Getting Started with the TI-84 Plus T Graphing Calculator This guidebook applies to software version 5.1. To obtain the latest version of the documentation, go to education.ti.com/go/download.

  • Page 2: Important Information

    "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...

  • Page 3: Table Of Contents

    Contents Important Information Using Your TI-84 Plus T Graphing Calculator Key Features Keyboard Basics Turning the TI-84 Plus T On and Off Using the TI-84 Plus T Keyboard Setting the Display Contrast Using the Home Screen Working with Menus Setting Up the Calculator Modes...
  • Page 4 Battery Information When to Replace the Batteries Effects of Replacing the Batteries Battery Precautions Replacing the Batteries Diagnosing and Correcting Error Conditions Diagnosing an Error Correcting an Error General Information Texas Instruments Support and Service Service and Warranty Information Index...

  • Page 5: Using Your Ti-84 Plus T Graphing Calculator

    Using Your TI-84 Plus T Graphing Calculator The TI-84 Plus T graphing calculator comes with a USB cable, plenty of storage and operating memory. It includes software applications (Apps) to help you perform pre- algebra, calculus, and science calculations. Key Features •...

  • Page 6: Keyboard Basics

    Press } (if the home screen is blank), to scroll through the calculator history. • If you turn off the TI-84 Plus T and connect it to another graphing calculator or personal computer, any communication will “wake" it up. Automatic Power Down™ (APD™) •...

  • Page 7: Using The Ti-84 Plus T Keyboard

    To prolong battery-life, turn off Exam Mode after an exam and make sure the Note: Exam LED is not blinking. (See section on Exam Mode and Exam LED.) Using the TI-84 Plus T Keyboard This section describes the functions of specific keys on the graphing calculator keyboard.
  • Page 8 Function Keys Access the second function printed to the left above each key. ƒ Access the third function printed to the right above each key. ƒ Access shortcut menus for fraction templates, n/d, quick matrix entry, select MATH menus, and VARS menu functions.
  • Page 9 Using the Function Keys Primary The function appears on the key. Function Ex: to display the MATH menu, press » . Secondary The function appears above the key in the same color as the y key. Function y key, the key name printed above the other key When you press the becomes active for the next keystroke.

  • Page 10: Setting The Display Contrast

    Press y † to darken the screen one level at a time. ▶ Press y } to lighten the screen one level at a time. The TI-84 Plus T retains the contrast setting in memory when it is turned off. Keyboard Basics...

  • Page 11: Using The Home Screen

    Using the Home Screen Use the home screen to enter instructions and evaluate expressions. Answers appear on the same screen. Most calculations are stored in home screen history. Press † to scroll through the entry history and paste the entries or answers to the current entry line. Enter a calculation.
  • Page 12 Displaying Entries and Answers Mode settings control how the TI-84 Plus T interprets expressions and displays answers. Press z to switch between classic entries and MathPrint™ mode. This guide focuses on MathPrint™ Mode, but may reference some classic entries. MathPrint™ Mode •...
  • Page 13 Press } or † to move the cursor to the entry or answer you want to copy and then press Í. The TI-84 Plus T highlights the entry the cursor is on to help you select your desired choice. The entry or answer that you copied is automatically pasted on the current input line at the cursor location.
  • Page 14 Using Shortcut Menus ƒ ^ Opens FRAC menu. ƒ _ Opens FUNC menu. ƒ ` Opens MTRX menu. ƒ a Opens VARS menu. Shortcut menus allow quick access to the following: Templates to enter fractions, and to toggle between whole and mixed fractions, and fractions and decimals.
  • Page 15 FUNC shortcut menu ƒ _ »MATH menu The shortcut menus are available to use where input is allowed. If the calculator is in Classic mode, or if a screen is displayed that does not support MathPrint™ display, entries will be displayed in Classic mode. The MTRX menu is only available in MathPrint™...
  • Page 16 ƒ or y, the cursor does not change because the cursor width is too narrow. Busy Indicator When the TI-84 Plus T is calculating or graphing, a vertical moving line is displayed as a busy indicator in the top-right corner of the screen. When you pause a graph or a program, the busy indicator becomes a vertical moving dotted line.

  • Page 17: Working With Menus

    Working with Menus You can access TI-84 Plus T commands using menus. Displaying a Menu • When you press a key to display a menu, that menu temporarily replaces the screen where you are working. • press » to display the MATH menu. •...
  • Page 18 -or- • Press ‘ to return to the previous screen. Using Menus When you press a key or key combination to display a menu, one or more menu names appear on the top line of the screen. • The menu name on the left side of the top line is highlighted. Up to seven items in that menu are displayed, beginning with item 1, which also is highlighted.

  • Page 19: Setting Up The Calculator Modes

    Setting Up the Calculator Modes Mode settings control how the calculator displays and interprets: • Answers • Elements of lists and matrices • Graphs • Language settings • Numbers Setting Modes To set calculator modes, press z. The following menu appears on your screen: To set calculator modes, press z.
  • Page 20 1.234567 x 10 If you select NORMAL notation, but the answer cannot display in 10 digits (or the absolute value is less than .001), the TI-84 Plus T expresses the answer in scientific notation.
  • Page 21 FLOAT   0   1   2   3   4   5   6   7   8   9 (floating) decimal mode displays up to 10 digits, plus the sign and decimal. FLOAT will display in the status bar. FLOAT Selecting 0123456789 specifies the number of digits (0 through 9) to display to the right of the decimal for decimal answers.
  • Page 22 • (q i ) (polar complex mode) displays complex numbers in the form (q i ). Note: The TI-84 Plus T does not support a complex number as a value in a fraction numerator and denominator. FULL     HORIZONTAL     GRAPH-TABLE screen mode uses the entire screen to display a graph or edit screen.
  • Page 23 FRACTION TYPE: n/d     Un/d displays results as a simple fraction. Fractions may contain a maximum of six digits in the numerator; the value of the denominator may not exceed 9999. displays results as a mixed number, if applicable. U, n, and d must be all be Un/d integers.
  • Page 24 Note: Using the Special Character Set The TI-84 Plus T CATALOG provides an item called CHARACTER if the Language Localizer App is running. You will find this item listed after several English commands in CATALOG. You can use this item to access special characters and accent marks for display messages and text strings that you want to store to a variable.
  • Page 25 Press the key associated with the alpha character that you want to accent, for example, [A] (above » ). The accented character is displayed in the edit line. | , ~ , † , or } to move the box to Done. Press Press Í...

  • Page 26: Evaluating Expressions

    • a combination of these elements. An expression evaluates to a single answer. On the TI-84 Plus T, you enter an expression in the same order as you would write it on paper. For example: pR is an expression. Order of Operations The TI-84 Plus T uses an order of operations system called Equation Operating System (EOS™), which...
  • Page 27 TI-84 Plus T implied multiplication rules differ from those of some other Note: graphing calculators. For example, the TI-84 Plus T evaluates 1 à 2X as (1 à 2)X , while some graphing calculators may evaluate 1 à 2X as 1 à (2X).

  • Page 28: Entering Expressions And Instructions

    For example, to calculate the log of 45, you must press « 45 . Do not enter the letters L , O , and G . If you enter LOG , the TI-84 Plus T interprets the entry as implied multiplication of the variables L , O , and G .
  • Page 29 (1.23.45 x 10 ) as if it was entered with parentheses. When you enter a number in scientific notation, the TI-84 Plus T does not automatically display answers in scientific or engineering notation. The mode settings and the size of the number determine the display format.
  • Page 30 In general, the first letter of each instruction name is uppercase. Some instructions take more than one argument, as indicated by an open parenthesis at the end of the name. For example, on the TI-84 Plus T, Circle( requires three arguments: Circle( X , Y , radius ) .
  • Page 31 Note: The TI-84 Plus T does not automatically set alpha-lock for entries that require list names. „...

  • Page 32: Working With Graphs

    Working with Graphs This section covers how to change color options on a graph, how to draw points on a graph, and how to insert an image as a background on a graph. Using the Graph Screen The examples below show how to set up the graph of a function. Here, the mode is set to FUNCTION and the default settings are assumed.
  • Page 33 y / ) to find minimum Note: Use the CALCULATE menu ( or maximum of functions and more. Working with Graphs...

  • Page 34: Working With Matrices

    Working with Matrices You can enter matrices using the matrix editor on your graphing calculator. For example, you can perform the following operations on matrices: • Addition • Inverses • Division • Multiplication • Elementary Row • Subtraction Operations To Use the Matrix Editor 1.
  • Page 35 ▶ Use the ¾ MATH menu to paste the 1: det( command -and- ¾ NAMES 3: [C] as matrix variables to the Home Screen. Remember that you cannot type in a matrix name from the calculator keypad. Note: Use the [ ] NAMES menu to paste a matrix name.

  • Page 36: Working With Probability And Statistics

    With each rand execution, the TI-84 Plus T generates the same random-number Note: sequence for a given seed value. The TI-84 Plus T factory-set seed value for rand is 0. To generate a different random-number sequence, store any nonzero seed value to rand.
  • Page 37 You can use the following statistics functions: Description Keys Best fit equations (regressions) … ~ } † … CALC menu Define and store up to three stat plot definitions Distributions y 9 ~ ~ List-based statistical analysis y 9 MATH menu …...
  • Page 38 To plot this data: 4. Press y ,. 5. Press 1: Plot1 (to set up a scatter plot for L1 and L2), then Í. 6. Press | to highlight On . Press Í. 7. Press q to automatically set up a graphing window for your data. 8.
  • Page 39 To find the two variable statistics for L1 and L2: 1. Press …. 2. Press ~ to highlight CALC . 3. Press † until you highlight 2:2-Var Stats , then Í. 4. Press † until you highlight Calculate , then Í. ▶...

  • Page 40: Working With Variables

    You can enter and use several types of data, including real and complex numbers, matrices, lists, functions, stat plots, graph databases, graph pictures, and strings. The TI-84 Plus T uses assigned names for variables and other items saved in memory. For lists, you also can create your own five-character names.

  • Page 41: Storing Variable Values

    Although most variables can be archived, system variables including r, T, X, Y, and q cannot be archived. • Apps are independent applications that are built-in the TI-84 Plus T. Apps cannot be deleted. Additional Apps cannot be loaded. Storing Variable Values Storing Values in a Variable Values are stored to and recalled from memory using variable names.
  • Page 42 To display the value of a variable, enter the variable name on a blank line on the home screen, and then press Í. Archiving Variables (Archive, Unarchive) You can store variables in the TI-84 Plus T user data archive, a protected area of memory separate from RAM. The user data archive lets you: •...

  • Page 43: Recalling Variable Values

    Recalling Variable Values Using Recall (RCL) To recall and copy variable contents to the current cursor location, follow these steps. To leave RCL , press ‘. 1. Press y K. RCL and the edit cursor are displayed on the bottom line of the screen.

  • Page 44: Solving Equations

    Solving Equations Press » B:Solver... to access the built-in numeric solver and the pre-loaded polynomial and systems of equations solver, PlySmlt2 App. Numeric Solver Steps for the Numeric Solver 1. Enter your equation as 0=expression and press Í. 2. Place the cursor on the variable to solve. For this example, the variable is X with stored value 5.
  • Page 45 System of Equations Solver Solving Equations...

  • Page 46: Managing Calculator Files

    Plus T, you cannot send the OS/Apps unit-to-unit from that TI-84 Plus T. You will have to download the correct TI-84 Plus T OS (with Apps) file for the TI-84 Plus T at education.ti.com/go/download. Then use TI Connect CE to load the complete OS/Apps file to the TI-84 Plus T.

  • Page 47: Exam Mode And Exam Led

    You should turn the exam LED off after the exam to preserve your battery. Using Press-to-Test Mode • Press-to-Test is a three-key sequence to place the TI-84 Plus T in the allowed state for an exam. • You may only set the calculator in exam mode when you are instructed by the examiner.
  • Page 48 Notes: The TI-84 Plus T is in exam mode when the LED is blinking amber. You can take the TI-84 Plus T out of exam mode using the following methods: • Link a calculator to a calculator (via the unit-to-unit cable), and then transfer any file(s) by pressing y [Link] SEND/RECEIVE .

  • Page 49: Using Applications (Apps)

    TI Connect™ CE software to reload the OS/Apps on the calculator. You can transfer the OS and built-in Apps unit- to-unit from another TI-84 Plus T, but only if the sending calculator has the complete set of built-in Apps.

  • Page 50: Conic Graphing App

    • Formulas • Variables • Text and numeric strings • Functions Each spreadsheet contains 999 rows and 26 columns. The amount of data you can enter is limited only by the available RAM. • Store (x,y) coordinate pairs to lists for viewing and optimizing functions for linear programming.

  • Page 51: Probability Simulation App

    • Calculates the roots (zeros) of polynomials of degree 1 through 10 with a convenient, easy-to-use interface. • Allows you to store solutions into lists, load a list into the application for polynomial coefficients, and store the polynomial to a Y-Var to graph after quitting the App. •...

  • Page 52: Using Accessories

    Using Accessories This section covers how to use: • TI computer software • TI Charging Station CE • TI rechargeable batteries Using the TI-SmartView™ CE The TI-SmartView™ CE software allows you to display a TI graphing calculator for your entire classroom. With TI-SmartView™ CE software, you can: •...

  • Page 53: Battery Information

    The backup battery provides auxiliary power to retain memory while you replace the AAA batteries. When to Replace the Batteries When the battery voltage level drops below a usable level, the TI-84 Plus T: Displays this message when you turn on Displays this message when you attempt the unit.

  • Page 54: Replacing The Batteries

    • Do not mix brands (or types within brands) of batteries. • Do not mix rechargeable and non-rechargeable batteries. • Install batteries according to polarity (+ and N) diagrams. • Do not place non-rechargeable batteries in a battery recharger. • Properly dispose of used batteries immediately.
  • Page 55 • Remove the cover. • Install the new battery, + side up. • Replace the cover and secure it with the screw. Use a LR44 Alkaline 1.5 V backup battery (or equivalent). Note: 4. Replace the backup battery compartment cover a) Turn the graphing calculator on.

  • Page 56: Diagnosing And Correcting Error Conditions

    Diagnosing and Correcting Error Conditions The TI-84 Plus T detects errors while performing these tasks: • Evaluating an expression • Executing an instruction • Plotting a graph • Storing a value 1. Determine the error. The error screens give helpful hints about what may have happened, but the errors are not always fully explained.

  • Page 57: General Information

    General Information Texas Instruments Support and Service education.ti.com Home Page: education.ti.com/international International Information: ti-cares@ti.com E-mail inquiries: education.ti.com/support/worldwide TI-Cares Customer Support Worldwide: education.ti.com/support KnowledgeBase (English only): Service and Warranty Information For information about the length and terms of the warranty or about product service, refer to the warranty statement enclosed with this product or contact your local Texas Instruments retailer/distributor.

  • Page 58: Index

    Func (function graphing mode) function graphing Cabri™ Jr. modes CellSheet™ function, definition of color graph format screen Y= editor color on the TI-84 Plus T graph-table split-screen mode (G-T) complex graphing-order modes modes (a+bi, re^qi) graphing modes numbers Graphs Conic Graphing...
  • Page 59 Keyboard Basics mode) parentheses Using the Keyboard Periodic Table Pol/Polar (polar graphing mode) polar graphing Matrices mode (Pol/Polar) menus Polynomial Root Finder and scrolling Simultaneous Equation shortcut Editor mode Probability and Statistics Answers Probability Classic Statistics MathPrint™ Probability Simulation mode settings a+bi (complex rectangular) Degree (angle) Radian angle mode...
  • Page 60 variables complex displaying and storing values graph databases graph pictures list matrix real recalling values types user and system Variables Vernier EasyData™ Index...

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