Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 4 - Section 4.1 - Basic Graphs - 4.1 Problem Set - Page 193: 57



Work Step by Step

$\tan(\theta)$ = $\frac{\sin(\theta)}{\cos(\theta)}$ This can be substituted into the equation: $cos(\theta)\tan(\theta)=\cos(\theta)\frac{\sin(\theta)}{\cos(\theta)}=\sin(\theta)$ Therefore, $cos(\theta)\tan(\theta)=\sin(\theta)$
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