integrating a circle ,,
my main question is that, can we integrate it by contour integration technique ?
and if yes ,, would you plz show me how :) or just give me a hint :D
Thanks is advance :-)
y^2 + x^2 = a^2
where a= r
suppose that a = 2
The Attempt at a Solution
i know that it can be done as two semicircles
taking a substitution x=2sin(u) ,, or even by integration by parts!!!