I've tried this numerous times and I just don't get how to do it.
Start by finding the points of intersection to find the limits of integration. And, by the way, I think that you are to find volume not area. Hence the rotation.
Start by finding the points of intersection to find the limits of integration. And, by the way, I think that you are to find volume not area. Hence the rotation.
Then recall washer method:
this is what I get:
points of intersections: (-1,1) & (1,1)
then
I don't know if thats correct. And how do i find R and r?