# Thread: Complex Variables - Analytic Function help needed

1. ## Complex Variables - Analytic Function help needed

a) Where is the function
$f(z)=e^{{x^2} - {y^2}}[\cos(2xy) + i \sin(2xy)]$ analytic?

b) Find $f'(z)$ and its derivative

2. ## Re: Complex Variables - Analytic Function help needed

Did you look at Cauchy-Riemann equations?