Answer
Yes.
Work Step by Step
If you shift the function rightward by $2$ units, the function remains the same. Since the function is preserved by a $2$ unit rightward push, the function is periodic with period $2$.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 7 - Trigonometry and Periodic Functions - Review Exercises and Problems for Chapter Seven - Page 315: 1
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