Answer
$\cos^{2}\theta$
Work Step by Step
Given expression is-
$\frac{\cos\theta}{\sec\theta}$
= $\frac{\cos\theta}{1/\cos\theta}$
= $\cos\theta \times \frac{\cos\theta}{1}$
= $\cos^{2}\theta$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 1 - Section 1.5 - More on Identities - 1.5 Problem Set - Page 45: 24
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