Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

APPENDIX D - Trigonometry - D Exercises - Page A 33: 66


$\frac{\pi}{3},\frac{2\pi}{3},\frac{4 \pi}{3}\frac{5 \pi}{3}$

Work Step by Step

We need to find the range for $x$ for the equation $3cot^{2}x=1$ $cot^{2}x=\frac{1}{3}$ or $tan^{2}x=3$ gives $tanx=±\sqrt 3$ This is true for x=$\frac{\pi}{3},\frac{2\pi}{3},\frac{4 \pi}{3}\frac{5 \pi}{3}$
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