`f(t) = cot(t)/e^t` Differentiate.

balajia | Student

`f(t)=cot(t)e^(-t)`

`f'(t)=(-cosec^2(t))e^(-t)+cot(t)(-e^(-t))`

`f'(t)=-((cosec^2(t)+cot(t)))/e^t`

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