1. For each of the following functions f , ﬁnd the residue of f at each of the isolated singu- larities of f . 2 (a) f (z) = z +2z +1 z4 + 3z3 sin z (b) f (z) = 1+ z2 (c) f (z) = csc z ...

1. For each of the following functions
f
, ﬁnd the residue of
f
at each of the isolated singu- larities of
f
.

(a)
f
(z) =
z
+2z
+1
z4 + 3z3

sin
z