Answer
Please see below.
Work Step by Step
$f(x)=2\cos x$: the red graph
$g(x)=\cos 2x$: the blue graph
$h(x)=(f+g)(x)$: the green graph
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 - Exercise Set - Page 596: 72
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