does anyone know how to work out the residue of this at 0
i already have that
Res(f,0)= .5 lim (2*pi^3*z*cot(pi*z) -2*pi^2)cosec^2(pi*z)
(as z tends to 0)
But i cant work out the limit, seeing as everytime i work it out i get different answers, i was told to use taylor series though