Solve the equation: 2 cos2 x + cos x - 1 = 0, 0 ≤ x < 2π.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 56E
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Solve the equation: 2 cos2 x + cos x - 1 = 0, 0 ≤ x < 2π.

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