Images COS 2X

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Cos 2x. 2cos2x. Cos2x cos8x-cos10x. Cos2x+cos4x+cos6x+cos8x 0. Cos два x.
2cos2x. Cos2x cos8x-cos10x. Cos2x+cos4x+cos6x+cos8x 0. Cos два x.

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