Answer
$Amplitude=3$
$Period=\pi$
Work Step by Step
If $y=a~cos(bx)$
$Amplitude=|a|$
$Period=\frac{2\pi}{b}$
$y=3~cos(2x)$
$Amplitude=|3|=3$
$Period=\frac{2\pi}{2}=\pi$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.4 - Graphs of Sine and Cosine Functions - 6.4 Exercises - Page 464: 6
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