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how to find derivative of (2+cotx)/(7-tanx)

  • trignometry -

    the derivative of cot x = -csc^2 x
    the derivative of tan x = sec^2 x

    .. and you do this:
    [ low*d(high) - high*d(low) ] / (low)^2

    high = numerator
    low = denominator
    d(high) and d(low) = respective derivatives

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