F'(x)=siny ye^x
f'(y)=xcosy e^x
Derivada -f '(x)/ f '(y)=(-siny-ye x)/(xcosx e x)
Entonces y=f(x) x=0.
f'(0)=(-siny-y)/(1)
=-siny-y
F'(x)=siny ye^x
f'(y)=xcosy e^x
Derivada -f '(x)/ f '(y)=(-siny-ye x)/(xcosx e x)
Entonces y=f(x) x=0.
f'(0)=(-siny-y)/(1)
=-siny-y