Evaluate the integral by changing to polar coordinates. ∫∫[D] x dA. Where D is the region in the first quadrant that lies bewteen the circles x^2+y^2=4 and x^2+y^2=2x.
Please, explain how can you find the limit for "r" ..
first circle has center (0,0), radius = 2
second circle has center (1,0), radius = 1
I know that
but where is D !!
"BETWEEN TWO CIRCLES" << Omg, i cant figure it out =(
And this is not for my homework
Actually, we dont hae homeworks in our university =D