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Images 2 SINX COS X A
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2cosx+cos2x=2sinx. Cosx×sin x=cos^2 x. Sinx * cos x = sin 2x. Cos2x-sinx-1=0.
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2cosx+cos2x=2sinx. Cosx×sin x=cos^2 x. Sinx * cos x = sin 2x. Cos2x-sinx-1=0. 