Algebra and Trigonometry 10th Edition

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

Chapter 7 - Review Exercises - Page 552: 3



Work Step by Step

Note: Sine and Cosine functions are related by a phase shift of $\frac{\pi}{2}$ Using the note above: sin($\frac{\pi}{2} - x)$ = cos(x)
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