Trigonometry 7th Edition

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



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, $\tan (-45)\approx-1.6198$
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