Asked by Sasa
4 Cos^2 x-1=0
Answers
Answered by
R_scott
4 Cos^2 (x) -1=0
4 Cos^2 (x) = 1
Cos^2 (x) = 1/4
Cos(x) = ± √(1/4)
4 Cos^2 (x) = 1
Cos^2 (x) = 1/4
Cos(x) = ± √(1/4)
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