Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.5 Write Trigonometric Functions and Models - 14.5 Exercises - Quiz for Lessons 14.3-14.5 - Page 945: 7


$x =2 n \pi \pm \dfrac{\pi}{3}$

Work Step by Step

Re-arrange the given equation as: $2 \cos x=1$ $\cos x=\dfrac{1}{2}$ $\cos x=\dfrac{\pi}{3}$ Therefore, the general solution of $\cos x$ is: $x =2 n \pi \pm \dfrac{\pi}{3}$
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