SOLUTION: What are all of the solution for 3cos^2(x) + 2cosx - 1 = 0

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Question 725683: What are all of the solution for 3cos^2(x) + 2cosx - 1 = 0
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
What are all of the solution for
3cos^2(x) + 2cosx - 1 = 0
For:[0,2π]
(3cosx-1)(cosx+1)=0
3cosx=1
cosx=1/3
x≈1.23
or
cosx+1=0
cosx=-1
x=π