SOLUTION: can you solve this problem 4cos^2x - 4cosx + 1 = 0

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Question 949476: can you solve this problem
4cos^2x - 4cosx + 1 = 0
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
can you solve this problem
4cos^2x - 4cosx + 1 = 0
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Yes, I can.
(2cos(x) - 1)^2 = 0
2cos(x) = 1
cos(x) = 1/2
x = pi/3 + n*2pi, n = 0,1,2,3...
x = 2pi/3 + n*2pi, n = 0,1,2,3...