Answer
Please see below.
Work Step by Step
We know that a sine function of the form $y=A \sin (Bx-C)$ has period $\frac{2\pi }{B}$.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 4 - Section 4.5 - Graphs of Sine and Cosine Functions - Exercise Set - Page 597: 91
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