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cos2x sin2x
cos2x sin2x identity
cos2x sin2x formula
cos2x sin2x 2cosx 1 0
cos2x sin2x 2sinx 1 2sin2x
sin2x + cos2x
sin2x + cos2x 1
cos2x - sin2x
sin2x x cos2x
sin2x * cos2x
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