Use the parametrisation of the circle by to show that
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Originally Posted by Richmond Use the parametrisation of the circle by to show that Presumably this is a definite integral, from 0 to 2π? Use the fact that is the real part of to write the integral as . Then let and it becomes (C is the unit circle), so you can use Cauchy's theorem.
Last edited by Opalg; April 28th 2009 at 08:34 AM. Reason: typo
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