SOLUTION: solve 4cos^2x-3=0 for all real values of x

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Question 314066: solve 4cos^2x-3=0 for all real values of x
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
4cos%5E2%28x%29-3=0
4cos%5E2%28x%29=3
cos%5E2%28x%29=3%2F4
cos%28x%29=0+%2B-+sqrt%283%29%2F2
x=30, 150, 210, 330