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28 September, 01:47

Rewrite with only sin x and cos x

Cos 2x*l+sin x

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  1. 28 September, 04:50
    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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