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Homework Statement
Determine [tex] \int \int_D (x^2+y^2)dA[/tex], where D is the area in the first quadrant of the xy-plane restricted by y=0, y=x, xy=1 and x^2-y^2=1, using variable change.
Homework Equations
Here's a picture of the situation:
http://www.aijaa.com/img/b/00050/3858610.jpg
The Attempt at a Solution
I'm out of ideas here, the only thing I came up with is to use polar coordinates. That would give me [tex] \int_0^{ \pi /4} \int_0^? r^3drd \theta[/tex]. As you can probably see, I have no clue as to what the limits are for r...
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