Answer
False.
Work Step by Step
Please note that the graph of $y=\cos \left ( x+ \frac{\pi }{4} \right )$ lies $\frac{\pi }{4}$ units to the left of the graph of $y=\cos x$.
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 - Concept and Vocabulary Check - Page 595: 7
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