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y=1
rotation about the line y=2
I've tried this numerous times and I just don't get how to do it.
**edit** I meant to say volume not area
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.Originally Posted by yoman360
y=1
rotation about the line y=2
I've tried this numerous times and I just don't get how to do it.
Then recall washer method:
![V_{solid}=\pi\int_a^b[(R)^2-(r)^2]dx](http://latex.codecogs.com/png.latex?V_{solid}=\pi\int_a^b[(R)^2-(r)^2]dx)
this is what I get: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:
points of intersections: (-1,1) & (1,1)
then
I don't know if thats correct. And how do i find R and r?
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