Texas Instruments TI-84 User Manual

Getting to Know Your TI-84 Plus Silver Edition

Turning Your TI-84 Plus Silver Edition On and Off

To turn on your TI-84 Plus Silver Edition, press ….

■

If you had previously turned off your TI-84 Plus Silver Edition by pressing y M, it will display the home screen as it was when you last used it.

To turn off your TI-84 Plus Silver Edition manually, press yM.

■

All settings and memory contents are retained by Constant Memory

To prolong the life of the batteries, Automatic Power Down™(APD™) turns

off your TI-84 Plus Silver Edition automatically after about five minutes

without any activity.

Using the y and É Keys

The secondary function of each key is printed in blue above the key. When you press the blue y key, the character, abbreviation, or word

printed in blue above the other keys becomes active for the next keystroke. For example, when you press y and then ç, the TEST

menu is displayed.

The alpha function of each key is printed in green above the key. When you press the green É key, the alpha character printed in green

above the other keys becomes active for the next keystroke. For example, when you press É and then ç, the letter A is entered.

TI-84 Plus Silver Edition Keyboard

å key accesses the Handheld Software Applications (Apps) loaded on your TI-84 Plus Silver Edition

É accesses the alpha function

™.

printed in green above each key

y accesses the second function printed in blue above each key

Operations keys

}~ Ü| keys let you move the cursor in four directions

ë erases (clears) the entry line or deletes an entry and answer on the home screen

Õ evaluates an expression,

executes an instruction, or selects

a menu item

Adjusting the Display Contrast

To adjust the contrast, follow these steps:

1 Press and release the y key. 2 Press and hold } or Ü (which are above

and below the contrast symbol).

} Darkens the screen Ü Lightens the screen

Home Screen

The home screen is the primary screen of the

TI-84 Plus Silver Edition. On this screen, you can enter

instructions to execute and expressions to evaluate.

The answers are displayed on the same screen.

To return to the Home Screen from any other screen, press y5.

Darker

Lighter

Special Features of the TI-84 Plus Silver Edition, TI-84 Plus, and TI-83 Plus

Flash™— Electronic Upgradability

The TI-84 Plus Silver Edition, TI-84 Plus, and TI-83 Plus use Flash

technology, which lets you update your operating system and

add Handheld Software Apps, such as Topics in Algebra 1, Inequality

Graphing, NoteFolio™, TImeSpan™, CellSheet™, and many more!

Comparing the TI-84 Plus Silver Edition and the TI-83 Plus

TI-84 Plus Silver Edition TI-83 Plus

Flash ROM 1.54 Mb 160 Kb

Holds up to 94 Apps 10 Apps

Preloaded Apps 18 4

Connectivity USB cable included TI Connectivity USB

cable sold separately

Case Color SILVER & Customizable Classic dark gray

Z80 Processor Speed 15 MHz 6 MHz

RAM 24 Kb 24 Kb

TI Connectivity Kit

With the TI Connect™software and TI Connectivity USB cable, you

can link your TI-84 Plus to a personal computer. As future software

updates become available on the TI website, you can download

the software to your computer and use the TI Connect software

and TI Connectivity USB cable to update your TI-84 Plus.

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Getting Started Using Your TI-84 Plus Silver Edition

TI-84 Plus Silver Edition Edit Keys

Keystroke Result

~ or | Moves the cursor within an expression. } or Ü Moves the cursor from line to line within an expression that

occupies more than one line. On the top line of an expression on the home screen, } moves the cursor to the beginning of the expression. On the bottom line, Ü moves the cursor to the end of the expression.

y| Moves the cursor to the beginning of an expression. y~ Moves the cursor to the end of an expression. Õ Executes an instruction and/or an expression. ë On a line with text on the home screen, clears the current line.

On a blank line on the home screen, clears everything on the home screen. In an editor, clears the expression or value where the cursor is located.

{ Deletes a character at the cursor. y 6 Changes the cursor to an underline (__) and inserts characters

in front of the underline cursor; to end insertion, pressy6, or press |}~or Ü.

y Changes the cursor to ; the next keystroke performs a

2nd operation (in blue above a key); to cancel 2nd, press y again.

É Changes the cursor to ÿ; the next keystroke pastes an alpha

character (in green above a key); to cancel É press

É again, or press |}~or Ü.

y7 Changes the cursor to ÿ; sets alpha-lock; subsequent

keystrokes paste alpha characters; to cancel alpha-lock, press É. If you are prompted to enter a name for a group or a program, alpha-lock is set automatically.

Ñ Pastes an X in Func mode, a T in Par mode, a␪␪in Pol mode,

or an n in Seq mode with one keystroke.

Display Cursors

In most cases, the appearance of the cursor indicates what will happen when you press the next key.

Cursor Appearance Effect of next keystroke

Entry Solid rectangle A character is entered at the cursor;

$ any existing character is overwritten.

Insert Underline A character is inserted in front of the

__ cursor location.

Second Up arrow A 2nd character (blue on the keyboard)

} is entered or a 2nd operation is executed.

Alpha Reverse A An alpha character (green on the keyboard)

ÿ is entered or SOLVE is executed.

Full Checkerboard No entry; the maximum number of

rectangle # characters has been entered at a prompt

or memory is full.

Using a TI-84 Plus Silver Edition Menu

You can access most TI-84 Plus Silver Edition operations 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 is also highlighted.

■

A number or letter identifies each menu item’s place in the menu. The order is 1 through 9, then 0, then A, B, C, and so on.

■

When the menu continues beyond the displayed items, a down arrow ( ) replaces the colon next to the last displayed item.

■

When a menu item ends in an ellipsis (...), selecting the item will display a secondary menu or editor.

Displaying a Menu

While using your TI-84 Plus Silver Edition, you will often

need to access items from its menus. When you press

a key that displays a menu, that menu temporarily

replaces the screen where you are working.

Example: Calculate 5 + 9

1. 5 + 9 Enter the expression in the home screen

2. Press ç

3. Press 3 to choose the correct item from the menu

4. Press Õ to calculate

Keystrokes: 2T6 ç 0 Õ 734

Moving Between Menus

Some of the keys on your TI-84 Plus Silver Edition

access more than one menu. When you press such

a key, the names of all accessible menus are

displayed on the top line. When you highlight a

menu name, the items in that menu are displayed. Press ~ and |to highlight each menu name.

Setting Modes

Mode settings control how your TI-84 Plus Silver Edition displays and

interprets numbers and graphs. Mode settings are retained by the

Constant Memory™feature when you turn off your TI-84 Plus Silver Edition.

All numbers, including elements of matrices and lists, are displayed

according to the current mode settings.

To display the mode settings on your TI-84 Plus Silver Edition, press z . The current settings will be highlighted. Default settings are

highlighted below.

Normal Sci Eng Numeric notation Float 0123456789 Number of decimal places Radian Degree Unit of angle measure Func Par Pol Seq Type of graphing Connected Dot Whether to connect graph points Sequential Simul Whether to plot simultaneously Real a+bi re ␪i Real, rectangular complex, or polar complex Full Horiz G-T Full screen, two split-screen modes

Changing Mode Settings

To change mode settings:

1 Press Ü or } to move the cursor to the line of the setting you want. 2 Press ~ or | to move the cursor to the setting you want. 3 Press Õ.

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TI-84 Plus Silver Edition Expressions, Menus, and Graphing

efining or Editing a Function for Graphing

Entering Expressions and Instructions

What is an Expression?

An expression is a group of numbers, variables, or functions and

their arguments, or a combination of these elements. An expression evaluates to a single answer. For example, ()2is an expression. On the

TI-84 Plus Silver Edition, you enter an expression in the same order as

you would write it on paper. You can enter an

expression on the home screen to calculate

an answer.

Entering an Expression

To create an expression, you enter numbers, variables, and functions

from the keyboard and menus on your TI-84 Plus Silver Edition. An expression is completed when you press Õ, regardless of the

cursor location. The entire expression is evaluated according to

™

Equation Operating System (EOS

and the answer is displayed. When an entry is

executed on the home screen, the answer is

displayed on the right side of the next line.

The mode settings control the way the TI-84 Plus Silver Edition interprets

expressions and displays answers. If an answer, such as a list or matrix,

is too long to display entirely on one line, an

ellipsis (...) is displayed to the right or left. Press ~ or | to display the rest of the answer.

To display the MATH menu, press

MATH NUM CPX PRB 1: Frac Displays answer as a fraction 2: Dec Displays answer as a decimal

(

4: 3√ 5: x√ Calculates xth root 6: fMin( Finds minimum of a function 7: fMax( Finds maximum of a function 8: nDeriv( Computes numeric derivative 9: fnInt( Computes integral of a function 0: Solver... Displays equation solver

To display the MATH NUM menu, press

MATH NUM CPX PRB 1: abs( Computes absolute value 2: round( Rounds value to specified decimal place 3: iPart( Calculates integer part 4: fPart( Calculates fractional part 5: int( Finds greatest integer less than or equal to number 6: min( Finds minimum value 7: max( Finds maximum value 8: lcm( Calculates least common multiple 9: gcd( Calculates greatest common divisor

To display the MATH PRB menu, press

MATH NUM CPX PRB 1: rand Generates random number between 0 and 1 2: nPr Computes number of permutations 3: nCr Computes number of combinations 4: ! Calculates factorial 5: randInt( Generates random integer in specified range 6: randNorm( Generates random # from Normal distribution 7: randBin( Generates random # from Binomial distribution

Calculates cube Calculates cube root

) rules (see General Math page),

çç

1 3

çç ~~

çç ||

To Define or Edit a Function

1 Press o to display the Y= editor.

2 Press Ü to move the cursor to the

function you want to define or edit. To erase a function, press ë.

3 Enter or edit an expression to define

the function.

Displaying a New Graph

To display a graph of the selected function, press s. TRACE, ZOOM, and CALC

operations display the graph automatically.

As the graph is plotted, the busy indicator is

on, and the X and Y values are updated.

Free-Moving Cursor

When you first display the graph, no cursor is visible. You must press |~}or Ü for the cursor to move from the center of the viewing window. Continue pressing |~}or Ü to move the cursor around.

Tracing a Function

Use the TRACE operation to move the cursor from one plotted point to the next along a function. To begin, press r. The TRACE cursor

is on the first selected function in the Y= editor, centered horizontally

on the screen. The cursor coordinates are displayed at the bottom of the screen if CoordOn format is selected. The Y= expression is displayed in the top left corner of the screen if ExprOn format is selected.

Moving the TRACE Cursor

To move the TRACE cursor Do this:

To the previous or next plotted point Press | or ~ Five plotted points on a function Press y | or y ~

(Xres affects this) To any valid X value on a function Enter a value & press Õ From one function to another Press } or Ü

To alter the viewing area of the graph, press

ZOOM MEMORY 1: ZBox Draws a box to define the viewing window 2: Zoom In Magnifies the graph around the cursor 3: Zoom Out Views more of a graph around the cursor 4: ZDecimal Sets ⌬X and ⌬Y to 0.1 5: ZSquare Sets equal-size pixels on the X and Y axes 6: ZStandard Sets the standard window variables 7: ZTrig Sets the built-in trig window variables 8: ZInteger Sets integer values on the X and Y axes 9: ZoomStat Sets the values for current stat plots 0: ZoomFit Fits Ymin and Ymax between Xmin and Xmax

To display the CALCULATE menu, press

CALCULATE 1: value Calculates a function Y value for a given X 2: zero Finds a zero (x-intercept) of a function 3: minimum Finds a minimum of a function 4: maximum Finds a maximum of a function 5: intersect Finds an intersection of two functions 6: dy/dx Finds a numeric derivative of a function 7: ∫f(x)dx Finds a numeric integral of a function

To return to the Home Screen from any other screen, press

yy //

yy 55

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