Find all solutions of the equation in the interval [0,2π) cos3xcosx+sin3xsinx=0

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 50E
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Find all solutions of the equation in the interval [0,2π)

cos3xcosx+sin3xsinx=0

 

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