Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.3 Verify Trigonometric Identities - 14.3 Exercises - Skill Practice - Page 928: 22

Answer

See below.

Work Step by Step

Using the distributive property: $1-(1-\cos^2\theta)=1-1+\cos^2\theta=\cos^2\theta$
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