SOLUTION: What are the x's of: 2cos^2(x)+3cos(x)=0

Question 750779: What are the x's of: 2cos^2(x)+3cos(x)=0
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
What are the x's of:
2cos^2(x)+3cos(x)=0
0 ≤ cos(x) ≤ 2π
2cosx(cosx+3)=0
2cosx=0
x=π/2, 3π/2
cosx+3)=0
cosx=-3 (reject, not in domain)

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