Help with derivative

Question

f(x)= (xcosx-x²sinx)/(x²)

Answer 1

hy Alex,

 

f(x) = x^-1 cos x - sin x

 

Now use the product rule to find the derivative of x^-1 cosx

 

f'(x) = -x^-2 cos x - x^-1 sin x - cos x