Question

A "little" integral problem, see the url for details: http://1337.is/~gaulzi/tex2png/view.php?png=201103301610252648.png

Answer 1

DUMP IN THE PARAMERIZATION
\[\int\limits_{0}^{2\pi}\]
then take derivitive of r1 wrt t variable. then thats your dx and dy and turn the x n y in the top eq into cos sin of (t) then dot that with the dx and dy and do a single LINE integrl from 0 to 2pi. thats the easiest way i can explain it. GREENS theorem