Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Appendix D - Trigonometry - D Exercises - Page A33: 65


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

Work Step by Step

Need to find the range for $x$ for the equation $2cosx-1$ $2cosx=1$ $cosx=\frac{1}{2}$ Since, $cosx>0$ on first and fourth quadrant thus, x must lie on $\frac{\pi}{3},\frac{5 \pi}{3}$
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