Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

by Sullivan III, Michael

Published by Pearson

ISBN 10: 0-32193-104-1

ISBN 13: 978-0-32193-104-7

Chapter 5 - Trigonometric Functions - Section 5.4 Graphs of the Sine and Cosine Functions* - 5.4 Assess Your Understanding - Page 431: 6

Answer

True.

Work Step by Step

True. We can write $y=cos(x)=sin(x+\frac{\pi}{2})$ indicating the two curves are identical except for a horizontal shift $\frac{\pi}{2}$.

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