Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 7 - 7.1 - Using Fundamental Identities - 7.1 Exercises - Page 514: 71



Work Step by Step

$cos~x$ is an even function, that is, $cos(-x)=cos~x$ $\frac{sin~\theta}{cos~(-\theta)}=\frac{sin~\theta}{cos~\theta}=tan~\theta$
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