Answer
$$A, \\ \frac{2\pi }{B}$$
Work Step by Step
Please note that the graph of $y=A \cos Bx$ has amplitude $A$ and period $\frac{2\pi }{B}$.
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 - Concept and Vocabulary Check - Page 595: 5
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