Precalculus (6th Edition) Blitzer

Published by Pearson

Chapter 4 - Section 4.5 - Graphs of Sine and Cosine Functions - Exercise Set - Page 596: 33

Answer

Please see below.

Work Step by Step

Please note that a cosine function $y=A\cos Bx$ has amplitude $|A|$. So the function $y=-2 \cos x$ has amplitude $|-2|=2$.

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