# Integrating Trigonometric functions (part 4)

We shall now proceed to integrating and similarly, lets refresh the formulas we should know.

(MF15)

(MF15)

So how do we ? I’ll first rewrite it as for some insights.

We can’t adopt the method here. So, Integration by parts?

Wait! again? hmmm.

So we have that

.

Then with a bit of juggling and manipulations, we have

.

I do hope this gives you some insights. You should try on your own using the information here.