Could someone go through this step step by step?
I get stuck at part ii
Thanks
Assuming that you have done part (i), the essential next step is to draw a diagram of the domain D. That should enable you to describe D in terms of u and v, namely that D is enclosed by the lines , , and . The change of variables formula then tells you that the integral is equal to
. . . . . .
The " "s conveniently cancel, and from then on the integral should be easy.
The formula says that if you make a change of variables from (x,y) to (u,v), so that f(x,y) becomes g(u,v), then the integral becomes .
See here for more on this topic. (But if you are being asked to do problems like this, then presumably it is expected that you already know this stuff.)