Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 5 - Trigonometric Functions - Chapter Review - Review Exercises - Page 458: 36

Answer

amplitude$=1$, period$= 4\pi$, phase shift$=-\pi$. See graph.

Work Step by Step

1. Given $y=-cos(\frac{1}{2}x+\frac{\pi}{2})$, we find the amplitude$=1$, period$=\frac{2\pi}{1/2}=4\pi$, phase shift$=-\pi$. 2. See graph.
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