Texas Instruments TI-83 Bedienungsanleitung

TI-83 Graphing Calculator Manual to Accompany

Precalculus Graphing and Data Analysis

How to Use This Manual

This manual is meant to provide users of the text with the keystrokes necessary to

obtain the output provided by the TI-83 graphing calculator as that obtained in the text.

This manual by no means covers all of the features of this calculator.

In addition, once a particular feature is introduced, it will not be discussed again.

For example, graphing is introduced in Section 1.2, therefore, when graphing is again

required in Section 6.4, the keystrokes required are not reviewed and are assumed to be

known.

Introduction to the TI-83

Before learning how to use the TI83 as a graphing calculator, an introduction to

the TI83 as a scientific calculator may be worthwhile. In this introduction, basic

calculator skills will be discussed.

Turning the Calculator On and Off

The ON button is located in the

lower left hand corner of the keyboard. To

turn the calculator off, press the 2nd button

and then the ON button. Notice that all 2nd

functions are in yellow on the keyboard.

An Introduction to the TI83 Keyboard

If you look at the bottom portion of the TI83, you should recognize that it looks

similar to a standard scientific calculator. This portion of the calculator is enclosed in the

box shown on the calculator above.

ON button

2nd

Function

When treating the graphing calculator as a scientific calculator, we typically work

from the HOME screen. This simply means there are no menus on the screen. Below I

have the HOME screen labeled. Notice the blinking cursor. In order to get to the HOME

screen from anywhere within the calculator simply press 2nd QUIT (QUIT is a 2nd

function located directly to the right of the yellow 2nd button).

Let’s review the keys associated with a scientific calculator starting with the 4 basic

functions of addition, subtraction, multiplication and division. The four binary operations

are located on the right side of the keyboard (they are blue). The traditional “equal sign”

is replaced with ENTER. So, to perform the operation 4 + 5, simply type 4 + 5

and hit ENTER.

The TI-83 is aware of the order of operations, so to evaluate:

(

)

6*543 −simply type:

3(4-5*6)

and hit ENTER. Note the * is the symbol for multiplication. The parenthesis are the

buttons located above the 8 and 9.

HOME

screen

EXPONENTS

Exponents can be handled using either the 2

xbutton or the caret key (^). For example, to

evaluate 2

5simply type 5and then push the 2

xbutton and hit ENTER. To evaluate 4

5 ,

type 5 ^ 4 and hit ENTER. NOTE: The 2

xbutton may only be used to raise a

quantity to the 2nd power.

To compute the reciprocal of a number use the 1−

xbutton. For example to compute 1

5−,

type 5 and then push the 1−

xbutton. Alternatively, you could use the caret key with

the “negative” button.

Notice the TI-83 automatically puts the solution in decimal form. Should you want your

answer to be in a fraction, use the FRAC option under the MATH menu. For example, to

compute the reciprocal of 5 with the solution in fraction

form, type: 5 and then push the 1−

xbutton, but instead of

hitting ENTER, press the MATH button and you see the

following menu:

xCaret (^)

1−

“Negative”

button

MATH

button

We wish to access option 1:Frac . Since this is the option currently highlighted, we

select it by pressing ENTER or pressing the number 1 on the keyboard. You should

obtain the following:

Press ENTER to see the result:

Suppose we computed the reciprocal of 5 without using the FRAC option as follows:

We then realize that we wanted our answer as a fraction. Rather than retyping the

previous command, we could simply access the MATH menu and select FRAC and

obtain the following:

The calculator automatically stores the most recent output in a memory locator call Ans.

So, the calculator will take the output in Ans and convert it to a fraction!

NOTE: Ans can also be retrieved using 2nd and the “negative” button.

RADICALS

You should see the square root ( ) as a 2nd function above the 2

button. So to compute 36 simply press 2nd then press the 2

xbutton, then 3 6 close

the parenthesis and press ENTER. To evaluate

radicals whose index is different than 2 we again go to

the MATH button. Notice options 4 and 5 are radicals:

So, to compute 481, type 4then select option 5 from the MATH menu, then type 81,

close the parenthesis and hit ENTER.

EXPONENTIALS AND LOGARITHMS

The LOG and LN buttons on the keyboard on located in the

bottom left portion of the keypad. Notice that x

10 and x

eare

2nd functions above these keys. It’s fairly straightforward to use

these features.

LOG

For example to compute log 3, simply press the LOG button followed by a 3 and a close

parenthesis and hit ENTER. To compute 4

e, press 2nd LN followed by 4 and hit

ENTER.

TRIGONOMETRIC FUNCTIONS

Notice the SIN, COS, and TAN functions. To

use these features, we need to know whether

our angle is in Degrees or Radians. Setting the

angle is done by pressing MODE.

After pressing the MODE button you should see the following:

Currently, the calculator is in radian mode. If we wish to change the calculator to degree

mode we use the arrows on the keyboard to move the blinking cursor down to highlight

Degree and then press ENTER. You should have the following:

SIN, COS,

TAN

MODE

To get back to the HOME screen press 2nd QUIT. Suppose we wish to evaluate: o

30sin ,

we press the SIN button then 3 0 ) and hit ENTER.

The inverse trigonometric functions are second functions above their corresponding

function. So, 1

sin −is a 2nd function of sin, etc.

OTHER FEATURES

If your HOME screen ever becomes too cluttered, we can clear it by using the CLEAR

button.

Another neat feature is the 2nd ENTER feature. Press 2nd ENTER a couple of times. You

should see that previous entries appear on the command line. The TI83 can remember

about the last 7 –10 commands entered!!! These commands can then be edited.

The remainder of the manual discusses features as they arise in the text.

1.2 Graphs of Equations

Example 3 Graphing an Equation on a Graphing Utility

Graph the equation 6 3 36

x y+ =

SOLUTION

Step 1: Done on page 15.

Step 2: To enter the expression y x= − +2 12

2into a TI-83. Press Y =

You should see the following on your screen:

The highlighted Plot1 means StatPlot is on.

To turn it off use the up arrow to put the

cursor on Plot1 and hit enter.

Move the cursor back down to Y1= and your

screen should look like this:

In Y1, type in the following order (consult the figure for the location of these buttons)

1. ( -)

2. 2

3. X,T,θ,n

4. x2

5. +

6. 1

7. 2

Y =

Your screen should have the following:

STEPS 3 and 4: To obtain a

graph with the standard

viewing window press

ZOOM and then select

option 6. Zstandard.

Immediately a graph should

start to appear on the

standard window.

STEP 5: To adjust the viewing window, press WINDOW. Use the arrows to move the

cursor to the values you wish to change. We wish to change Ymin to -12, so move the

cursor to Ymin and make its value -12. Press GRAPH and you should obtain the

following:

( -)

NOTE: This is not

the subtraction sign.

This button represents

the negative of a

number.

X,T,θ,n

This squares the

quantity preceding it.

USING THE TABLE FEATURE

The table feature can be activated by pressing 2nd GRAPH. In order for the feature to

work, you must have at least one equation entered in the Y = menu. Before proceeding to

the table, I first want to introduce the TABLESET feature. This is activated by pressing

2nd WINDOW on your TI-83.

After pressing 2nd WINDOW, the following should appear.

I first want to direct your attention to the Independent variable (x-variable) setting.

Currently AUTO is highlighted. This means the calculator will automatically fill in a

table starting at x= 0 and increasing by values of 1. To see this concept we will

reproduce Table 2 on page 18. Let Y1= x2-4. Press 2nd WINDOW to access table setup

and change

TblStart to -3 to

obtain the

following.

TaBLeSET

TABLE

Independent

Variable

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