3sin²x - sinx - 2 =-cos²x - Зп 2 2п

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 105E
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How can I solve the following problem 

3sin²x - sinx-2=-cos²x
3π
N|S
2
,2π
Transcribed Image Text:3sin²x - sinx-2=-cos²x 3π N|S 2 ,2π
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why did you subtract 2pi from pi/6 and where did it come from

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