For a scalar field f(x,y)=exsinyf(x, y) = e^x \sin yf(x,y)=exsiny, what is the second partial derivative fxyf_{xy}fxy?
exsinye^x \sin yexsiny
excosye^x \cos yexcosy
−exsiny-e^x \sin y−exsiny
−excosy-e^x \cos y−excosy