For the following exercises, simplify each expression. Do not evaluate. cos 2 (9x) − sin 2 (9x)

Chapter 7, 7.3 Exercises #31

For the following exercises, simplify each expression. Do not evaluate.

cos2 (9x) − sin2 (9x)

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Related Book For answer-question

Precalculus

1st Edition

Authors: Jay Abramson

ISBN: 9781938168345