Texas Instruments TI-82 Getting Started page 4

Here is a situation where this is especially useful. Suppose a person makes $5.85 per hour and you are asked
to calculate earnings for a day, a week, and a year. Execute the given keystrokes to find the person's incomes
during these periods (results are shown in Figure I.4.):
Pay period
8-hour day
5-day week
52-week year
I.1.7 The MATH Menu: Operators and functions associated with a scientific calculator are available either
immediately from the keys of the TI-82 or by the 2nd keys. You have direct key access to common arithmetic
2
operations ( , 2nd x
-1 -1
( 2nd SIN , 2nd COS , 2nd TAN ), exponential and logarithmic functions (LOG, 2nd
and a famous constant (2nd π).
A significant difference between the TI-82 graphing calculators and most scientific calculators is that the
TI-82 requires the argument of a function after the function, as you would see a formula written in your
textbook. For example, on the TI-82 you calculate
Here are keystrokes for basic mathematical operations. Try them for practice on your TI-82.
Expression
2
3 4
1
2
3
5
log 200
2.34 10
Additional mathematical operations and functions are available from the MATH menu. Press MATH to see
the various options (Figure I.5). You will learn in your mathematics textbook how to apply many of them.
As an example, calculate
press 7 ENTER to see 1.912931183. To leave MATH menu and take no other action, press 2nd QUIT or
just CLEAR.
I-4
Copyright © by Houghton Mifflin Company. All rights reserved.
Keystrokes
5.85
Figure I.4: ANS variable
-1
, x , ^, 2nd ABS), trigonometric functions (SIN, COS, TAN) and their inverses
-1
Keystrokes
2
2nd (3
-1
2 + 3 x
2nd ABS (-) 5 ENTER
LOG 200 ENTER
5
2.34 2nd
3
7 by pressing MATH and then either 4
8 ENTER
5 ENTER
52 ENTER
by pressing the keys 2nd
16
2 2
x + 4 x ) ENTER
ENTER
x
10 5 ENTER
3
Balance
$46.80
$234
$12,168
x
10 , LN, 2nd
16 in that order.
Display
5
2.333333333
5
2.301029996
234000
or ENTER; finally
TI-82 Graphics Calculator
x
e ),