By using substitution, show that x = 4 pi / 6 is a solution to the equation sin (2x) = cos (x). Show all your work.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 106E
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By using substitution, show that x = 4 pi / 6 is a solution to the equation sin (2x) = cos (x). Show all your work. 

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