Complex Analysis - Contour integration
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Using contour integral methods in the complex plane and the residue theorem.
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Please see the attachment for detailed solution.
The integral is:
The integration is over the real axis.
We can write it as a complex integral:
In order to take advantage of Cauchy's residue theorem, we would like to find a closed path that includes the real axis and some path that we know the value of the integral on.
Let's look at the first integral
If the real axis is the path and the other yet unknown path is then the closed path is and:
The expert examines the complex analysis for contour integration.