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25 March, 18:41

Find derivative of 2cosx+2cos2x

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  1. 25 March, 20:44
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    Derivitive of cosx=-sinx

    dy/dx sinx=cosx

    and use chain rue

    2cosx=-2sinx

    2cos2x=-4sin2x

    so

    -2sinx-4sin2x id the deritivitve
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