Question 306032
solve for x: cos x - cos ² x = 0
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cos(x)*(1-cos(x)) = 0
cos(x) = 0
x = pi/2 + n*pi, n = 0,1,2,3.....
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cos(x) = 1
x = 0 + 2n*pi, n = 0,1,2,3...