Algebra and Trigonometry 10th Edition

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

Chapter 7 - 7.2 - Verifying Trigonometric Identities - 7.2 Exercises - Page 521: 63


False. $tan~x^2=tan(x·x)$ $tan^2x=tan~x~tan~x$

Work Step by Step

Notice that $tan^2x\geq0$ for any $x$ in the domain of $tan^2x$ But, $tan(\frac{\sqrt {3\pi}}{2})^2=tan\frac{3\pi}{4}=-1\lt0$
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