Texas Instruments TI 84 Plus CE Calculator Manual
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Using Your TI-84 Plus CE Graphing Calculator
The TI-84 Plus CE graphing calculator comes with a USB cable, plenty of storage and operating memory. It also comes pre-loaded with software applications (Apps) to perform pre-algebra, algebra, calculus, biology, chemistry, and physics calculations.
Key Features
- High resolution, full-color backlit display
- Distinguish between multiple graphs and plots with color-coded equations, plots, and objects
- Make graphs easier to read by adding grid lines
- TI Rechargeable Battery
- Recharges using a USB cable, wall charger, or TI Charging Station CE
- Familiar TI-84 Plus functionality
- Similar menu structure and navigation as the TI-84 Plus family with enhanced features
- Built-in Math Print™ functionality to input and view math symbols, formulas and stacked fractions
- Import and use images
- Use TI Connect™ CE Software to send images (.gif, .jpg, .pang, .tiff, .bmp) from a computer to a calculator
- Graph on top of images to connect concepts to the real world
Setting the Display Brightness
This section covers how to set the display brightness and explains automatic dimming.
Adjusting the Display Brightness
You can adjust the display brightness to suit your viewing angle and lighting conditions.
To adjust the brightness, follow these steps.
- 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 CE retains the brightness setting in memory when it is turned off.
Automatic Dimming
The TI-84 Plus CE automatically dims the screen brightness after 90 seconds of inactivity.
- Press É to return the screen to the preset brightness.
- Pressing É to adjust the brightness will not affect any of the current state of your calculator work.
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, pressz. The following menu appears on your screen:
Note: When you press, the cursor is on NORMAL by default. Press } to switch between Math Print™ and Classic modes.
Note: The Constant Memory™ feature retains mode settings when the unit is turned off.
Changing Mode Settings
To change mode settings, follow these steps:
- Press † or } to move the cursor to the line of the setting that you want to change.
- Press ~ or | to move the cursor across the line to the desired setting.
- Press select a setting.
Evaluating Expressions
An expression is a group of
- numbers,
- variables,
- functions and their arguments, -or-
- a combination of these elements
An expression evaluates to a single answer. On the TI-84 Plus CE, you enter an expression in the same order as you would write it on paper. For example: pR2 is an expression.
Order of Operations
The TI-84 Plus CE uses an order of operations system called Equation Operating System (EOS™), which
- defines the order in which functions in expressions are entered and evaluated
-and- - allows you to enter numbers and functions in a simple, straightforward sequence
EOS™ evaluates the functions in an expression in this order:
Note: Within a priority level, EOS™ evaluates functions from left to right. Calculations within parentheses are evaluated first. A number in scientific or engineering notation, 2.34â6, is interpreted as (2.3×106) with parentheses so the number remains the correct
value during the EOS™ calculation.
Implied Multiplication
The TI-84 Plus CE recognizes implied multiplication, so you do not need to press ¯ to express multiplication in all cases. For example, the TI-84 Plus CE interprets 2p, 4sin(46), 5(1+2), and (2ä5)7 as implied multiplication.
Functions
A function returns a value. For example, log( and sin( are functions. In general, the first letter of each function is lowercase. Most functions take at least one argument, as indicated by an open parenthesis following the name. For example, sin( requires one
argument, sin(value).
Note: To see the arguments of a function or command in the calculator, find the item in a menu oryNand press +. For most menu items, a Catalog Help screen will display and the syntax of the arguments will be displayed.
Instructions
An instruction (command) initiates an action on the calculator. For example, ClrDraw is an instruction to the calculator to clear drawn elements from a graph. Instructions cannot be used in expressions. 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 CE, Circle( requires three arguments, and has two optional arguments:
Interrupting a Calculation
To interrupt a calculation or graph in progress, which is indicated by the busy indicator in the status bar, press É.
When you interrupt a calculation, a menu is displayed.
- To return to the home screen, select 1:Quit.
- To go to the location of the interruption, select 2:Goto.
When you interrupt a graph, a partial graph is displayed. - To return to the home screen, press‘or any non-graphing key.
- To restart graphing, press a graphing key or select a graphing instruction.
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 Color on the TI-84 Plus CE
The TI-84 Plus CE graphing calculator has many color options and a high resolution display that allows more information to be shown on the screen. The TI-84 Plus CE uses color in the following ways:
- Y= editor for line color.
- DRAW commands for line color, such as vertical lines, circles, and text on the graph screen.
- The graph format screen for grid, axes, or border color, and applying a background image or color.
- Statistical Plots.
Color options for various features are accessed via a spinner menu. With the cursor on a color selection for a feature, use the | or ~ to change the color. When the cursor is on any spinner menu, the context help in the status bar frequently displays the hint:
PRESS [<] OR [>] TO SELECT AN OPTION.
Note: Take care to choose appropriate color combinations for the graph areas so that all features are visible.
Using Quick Plot and Fit Equation
Quick Plot and Fit Equation allows you to drop points on a graph screen and model a curve to those points using regression functions. You can select color and line style, draw points on a graph, and choose an equation to fit the drawn points. You can then store the results of the plot and equation.
Quick Plot and Fit Equation is an option in the… CALC menu.
Prior to starting the Quick Plot and Fit Equation interactive feature on the graph area, be sure to set your Background Image Var and other graph settings from the FORMAT screen. Also set your WINDOW or ZOOM settings.
Working With Images
The TI-84 Plus CE uses both pictures and background images. They are both stored in Flash archive, but they are used in different ways.
Using Pictures and Backgrounds
Image Vars (Image1 – Image9, and Image0) are variables stored in archive memory. An Image Var is used as a Background Image in the graph area. Several images are pre-loaded on the TI-84 Plus CE. You can also convert images to TI-84 Plus CE Image Vars in the TI Connect™ CE software and load them to the calculator. You cannot create images on the calculator.
REFERENCE
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Texas Instruments TI 84 Plus CE Calculator Manual