Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 7 - Trigonometry and Periodic Functions - Strengthen Your Understanding - Page 320: 38

Answer

True

Work Step by Step

We see that the $x$ is not multiplied by anything on the inside of the cosine equation. Thus, the period is equal to $2\pi$, for the period of cosine is always $2\pi$ unless the function is altered.
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