Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 6 - Trigonometric Functions - 6.4 Graphs of the Sine and Cosine Functions - 6.4 Assess Your Understanding - Page 407: 9

Answer

(d).

Work Step by Step

One period of the specified graphs is also called a $cycle$. Thus the answer is (d).
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