Precalculus (10th Edition)

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

Chapter 6 - Trigonometric Functions - 6.3 Properties of the Trigonometric Functions - 6.3 Assess Your Understanding - Page 395: 102

Answer

$[-1,1]$

Work Step by Step

For any value of $\theta$, $-1\leq \cos{\theta}\leq1$. Thus, the range of the cosine function is $[-1,1].$
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