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 513: 13


$sec~x~cos~x=1$ (c)

Work Step by Step

We know that: $sec~x=\frac{1}{cos~x}$ $sec~x~cos~x=\frac{1}{cos~x}cos~x=1$
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