Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 7 - Analytic Trigonometry - Chapter Review - Review Exercises - Page 506: 41

Answer

See below.

Work Step by Step

$LHS=1-8sin^2\theta cos^2\theta=1-2(sin2\theta)^2=cos(4\theta)=RHS$
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