## Precalculus (6th Edition) Blitzer

Published by Pearson

# Chapter 4 - Section 4.5 - Graphs of Sine and Cosine Functions - Exercise Set - Page 596: 35

#### Answer

Please see below.

#### Work Step by Step

Please note that a cosine function $y=A\cos Bx$ has amplitude $|A|$ and period $\frac{2\pi }{B}$. So the function $y=\cos 2x$ has amplitude $|1|=1$ and period $\frac{2\pi }{2 }=\pi$.

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