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13 December, 01:26

Rewrite with only sin x and cos x

Cos 2x*l+sin x

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  1. 13 December, 01:39
    0
    sin (2x) = 2sinxcosx

    cos (2x) = cos2x - sin2x

    sin (2x) - cos (2x) = 2 sinx cosx - (cos2x - sin2x)

    sin (2x) - cos (2x) = 2 sinx cosx - cos2x + sin2x
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