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OpenStudy (anonymous):
Find all solutions of the equations. 2 cos 2ϴ -1=0. Find the solutions in the interval [0, 2π).
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OpenStudy (cwrw238):
2 cos 2ϴ -1=0 cos 2ϴ = 0.5 2ϴ = pi/3 now find all the values of 2ϴ in the range 0 to 4pi and divide each of them by 2
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