#### Answer

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#### Work Step by Step

Please note that an interval containing two periods can be found by solving the following inequality:$$-\frac{\pi }{2} \lt \frac{x}{4} \lt \frac{3\pi }{2} \quad \Rightarrow \quad -2\pi \lt x \lt 6\pi$$

Published by
Pearson

ISBN 10:
0-13446-914-3

ISBN 13:
978-0-13446-914-0

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