1. ## complex integrals

hello,
I wonder if someone can help me solve:
1.what are the singularic points of f(z)
2.how to solve the integral

thank's

2. Originally Posted by avazim
hello,
I wonder if someone can help me solve:
1.what are the singularic points of f(z)
2.how to solve the integral

thank's
z = 0 is a pole of order 3.

3. i still not so understand why it is a pol in order 3?
and after that to sole the intgeral i just need to find 2*pi*i*RES(f,0); 0 as order 3 ?

4. Originally Posted by avazim
i still not so understand why it is a pol in order 3?
and after that to sole the intgeral i just need to find 2*pi*i*RES(f,0); 0 as order 3 ?
To see why z = 0 is a pole of order 3, substitute the Maclaurin series for sin z and simplify ....