#### noobishnoob

##### New member

- Joined
- Sep 29, 2017

- Messages
- 9

I am currently working on two separate problems that involve the integration of sin(x

^{2}) and e

^{r2}with respect to r.

As you can see in the image, the question asks to evalute the double integral using polar coordinates.

Since r=sqrt(x

^{2}+y

^{2}), the integral becomes sin(r

^{2}) and e

^{r2}. But how do I go ahead with this? It looks like a fairly simple integration, but in my experience it did not turn out to be so.

I have tried integrating this by parts and gone around in circles where the result has to be integrated by parts again and again. I don't seem to recognise any integration method of solving it.

Any advice would be appreciated, thanks.