Texas Instruments TI-82 Manual 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 2.4):
Pay Period
8-hour day
5-day week
52-week year
2.1.7 The MATH Menu: Operators and functions associated with a scientific calculator are available either
immediately from the keys of the TI-82 or by 2nd keys. You have direct key access to common arithmetic
2 –1
operations (x , 2nd, , x
–1 –1
SIN , 2nd COS , 2nd TAN
famous constant (2nd π).
A significant difference between the TI-82 and many 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 16 by pressing the keys 2nd
Here are keystrokes for basic mathematical operations. Try them for practice on your TI-82.
Expression
2 2
3 + 4
2
1
3
5 −
log 200
5
2.34·10
4
G T
RAPHING ECHNOLOGY
Keystrokes
5.85 × 8 ENTER
× 5 ENTER
× 52 ENTER
Figure 2.4: ANS variable
, ^, 2nd ABS), trigonometric functions (SIN, COS, TAN) and their inverses (2nd
–1
), exponential and logarithmic functions (LOG, 2nd 10
16 in that order.
Keystrokes
2
2nd ( 3 x + 4 x
–1
2 + 3 x ENTER
2nd ABS (-) 5 ENTER
LOG 200 ENTER
x
2.34 × 2nd 10 5 ENTER
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G : TI-82
UIDE
Earnings
$46.80
$12,168
Display
2
) ENTER
2.333333333
2.301029996
234000
$234
X X
, LN, 2nd e ), and a
5
5