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 - Section 5.3 Properties of the Trigonometric Functions - 5.3 Assess Your Understanding - Page 418: 89



Work Step by Step

As $\sin (\theta+2\pi)=\sin(\theta+4\pi)=\sin\theta$, then $\sin\theta+\sin(\theta+2\pi)+\sin(\theta+4\pi)=\sin{\theta}+\sin{\theta}+\sin{\theta}=3\sin\theta=3(0.3)=0.9$
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