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: 65


$x = \frac{\pi}{3}~~$ or $~~x = \frac{5\pi}{3}$

Work Step by Step

We can find the values of $x$: $2~cos~x - 1 = 0$ $2~cos~x = 1$ $cos~x = \frac{1}{2}$ $x = \frac{\pi}{3}~~$ or $~~x = \frac{5\pi}{3}$
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