Images COS 2X

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Cos 2x. Sin3x=cos2x. Sin3x cos3x sin2x cos2x. 3sin2x 2 sin2x cos2x. 3-Sin2x-cos2x.
Sin3x=cos2x. Sin3x cos3x sin2x cos2x. 3sin2x 2 sin2x cos2x. 3-Sin2x-cos2x.

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