For the following exercises, prove the identity. cos x − cos(3x) = 4 sin 2 x cos x

Chapter 7, 7.4 Exercises #61

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For the following exercises, prove the identity.

cos x − cos(3x) = 4 sin2 x cos x

Related Book For answer-question

Precalculus

1st Edition

Authors: Jay Abramson

ISBN: 9781938168345