Answer
$-1.6198$
Work Step by Step
Step 1: Ensure that the calculator is in radian.
Step 2: Type $\tan (-45)$ into the calculator and press enter.
Step 3: Rounding out the answer to 4 decimal places,
$\tan (-45)\approx-1.6198$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 3 - Section 3.3 - Definition III: Circular Functions - 3.3 Problem Set - Page 145: 73
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