Answer
See explanations.
Work Step by Step
Step 1. $LHS=\frac{1/cos\theta}{1+1/cos\theta}=\frac{1}{cos\theta+1}$
Step 2. $RHS=\frac{1-cos\theta}{1-cos^2\theta}=\frac{1}{1+cos\theta}=LHS$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 7 - Analytic Trigonometry - 7.4 Trigonometric Identities - 7.4 Assess Your Understanding - Page 476: 68
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