# Math Help - [SOLVED] Special Case of Cauchy's Integral Formula

1. ## [SOLVED] Special Case of Cauchy's Integral Formula

I dont understand at all.

2. Originally Posted by davismj

I dont understand at all.
the circle centered at a with radius r has the equation $z(t) = a + re^{it}$

hence $~dz = ire^{it} ~dt$

substitute it to the cauchy integral formula

3. Originally Posted by dedust
the circle centered at a with radius r has the equation $z(t) = a + re^{it}$

hence $~dz = ire^{it} ~dt$

substitute it to the cauchy integral formula
Wow, you've helped me so much on this one. I understand Complex Analysis so much more now.