Find all solutions of the equation 2 cos x +√3 = 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 2 cos x +√3 = 0.

Expert Solution
Step 1

To solve the equation 2cosx+3=0.

Solving the  given equation.

2cosx+3=02cosx=-3cosx=-32

We know that cosine function is negative is negative in quadrant II and quadrant III.

x=cos-132=2π3,7π6

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