Partial derivatives for $f(x) = e^y(x \sin(x) - y \cos(x)) $

Question

i have to find the partial derivatives for x and y for this function: $f(x) = e^y(x \sin(x) - y \cos(x)) $

I am used to find partial derivatives for functions that follows this pattern:

$x^4+y^4-(x-y)^2$ (just an examples) ,but the first function is new to me and I don't know how should I tackle it. Any tips would be great. Thanks.