Answer
$1$
Work Step by Step
Use the Identity $\cos 2 \theta =1-2 \sin^2 \theta$
Thus, we have
$\dfrac{ \cos 2 \theta}{1- 2\sin^2 \theta}=\dfrac{\cos 2 \theta}{\cos 2 \theta}=1$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.7 Apply Double-Angle and Half-Angle Formulas - 14.7 Exercises - Skill Practice - Page 960: 21
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