Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - Chapter 7 Test Prep - Review Exercises - Page 736: 25



Work Step by Step

$\cos 2\alpha =\cos ^{2}\alpha -\sin ^{2}\alpha \Rightarrow \cos 300=\cos ^{2}150-\sin ^{2}150\Rightarrow 25\rightarrow F$
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