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: 64


True. $cos(θ-\frac{\pi}{2})=sin~θ$

Work Step by Step

$cos~x$ is an even function. So, $cos(θ-\frac{\pi}{2})=cos(\frac{\pi}{2}-θ)=sin~θ$
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