Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.6 - Graphs of Other Trigonometric Functions - Exercise Set - Page 610: 22

Answer

Please see below.
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Work Step by Step

Please note that an interval containing two periods can be found by solving the following inequality:$$0 \lt \frac{\pi }{4}x \lt 2\pi \quad \Rightarrow \quad 0 \lt x \lt 8$$
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