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OpenStudy (anonymous):
find all the solutions to the interval [0,2pi) of the equation cos^22x=1/2
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OpenStudy (anonymous):
cos^2(2x)=1/2 cos2x=(+/-)1/4 case 1, cos 2x=1/4, 2x=1.32,4.97 x=0.66,2.49 case 2, cos 2x=-1/4, 2x=1.82,3.45 x=0.91,1.73
OpenStudy (anonymous):
dont know if there are some more solution. I haven't done these for long
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