If f(x) = (cos x)(esin x ), then, correct to the nearest hundredth, f '(2.0) =

Question

The answers suppose to be 0.86 but i always get -1.83

Answer 1

If
f(x)=cos(x)*e^(sin(x))
then
f'(x) = -1.82747...

To find the problem you have, I suggest you verify if f(x) is as defined above, and what did you get for f'(x)?