- #1
Mappe
- 30
- 0
Need help with complex problems!
I have trouble with a residue problem:
Integral -inf --> inf sin(ax)/(x^2 + 4x + 5)
As both it's poles contains both a real and a complex side, the sin(ax) part gets very ugly when I try to calculate it's residues. And I get a complex answere! Do I just ignore the complex part of the answere, and why?
Also, I can't figure out how to make a laurentseries out of:
1/(1-cos(x))
Thanx for any help!
I have trouble with a residue problem:
Integral -inf --> inf sin(ax)/(x^2 + 4x + 5)
As both it's poles contains both a real and a complex side, the sin(ax) part gets very ugly when I try to calculate it's residues. And I get a complex answere! Do I just ignore the complex part of the answere, and why?
Also, I can't figure out how to make a laurentseries out of:
1/(1-cos(x))
Thanx for any help!