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Help. 0 < x < 2p a) 4cos2 x - 1 = 0 Isolate for the square term 4cos2 x = 1 divide by 4 cos2 x = 1/4 take the square root cos x = + 1/2?

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  • Help. 0 < x < 2p a) 4cos2 x - 1 = 0 Isolate for the square term 4cos2 x = 1 divide by 4 cos2 x = 1/4 take the square root cos x = + 1/2?


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