Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 7 - 7.2 - Verifying Trigonometric Identities - 7.2 Exercises - Page 521: 43


$cot(-x)$ is not equal to $cot~x$

Work Step by Step

$cot(-x)=-cot~x$ $\frac{1}{tan~x}+cot(-x)=cot~x-cot~x=0$
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