Answer
period $ 1$, amplitude $3$, see graph.
Work Step by Step
Given $y=3cos(2\pi x)$, we can identify its period as $p=\frac{2\pi}{2\pi}=1$ and its amplitude as $3$, see graph.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 6 - The Circular Functions and Their Graphs - 6.3 Graphs of the Sine and Cosine Functions - 6.3 Exercises - Page 601: 36
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