# How do you differentiate # f(x)=cot(x)cos(x)# using the product rule?

##### 1 Answer

Oct 28, 2015

#### Answer:

This is more a pointer in the correct direction:

#### Explanation:

Once you know that

and you combine it with

You are off to a flying start. Just substitute and play until you find a solution:

As a check I put it into Maple which gave:

Maple outputs are sometimes a little 'Maple'ish' so need to be translated.

remember that

so you may be able to use: