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: 22



Work Step by Step

Pythagorean Identity: $tan^2x+1=sec^2x$ $tan^2x=sec^2x-1$ $sin^2x~sec^2x-sin^2x=sin^2x(sec^2x-1)=sin^2x~tan^2x$
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