Y dil iredicible ele edicible ement. sin z cos z 54 let f(z) = then, z f has a pole of order 2 at z = 0. z (a) (b) f has a simple pole at z = 0. (c) f(z)dz =0,

y dil iredicible ele edicible ement. sin z COS Z 54 Let f(z) = Then, z f has a pole of order 2 at z = 0. Z (A) (B) f has a simple pole at z = 0. (C) f(z)dz =0, where the Integral is taken anticlock wise |z = 1. (D) the residue of f at z = 0 is -27t.