- #1
bugatti79
- 794
- 1
Folks,
Differentiate implicitly [tex]\phi(x,y)=0[/tex] I get:
wrt to x [tex]\phi_x+\phi_y \frac{dy}{dx}[/tex] and
wrt to y [tex]\phi_y+\phi_x \frac{dx}{dy}[/tex]
however I don't know how this is derived
[tex]\phi_x dx+\phi_y dy=0[/tex]
Differentiate implicitly [tex]\phi(x,y)=0[/tex] I get:
wrt to x [tex]\phi_x+\phi_y \frac{dy}{dx}[/tex] and
wrt to y [tex]\phi_y+\phi_x \frac{dx}{dy}[/tex]
however I don't know how this is derived
[tex]\phi_x dx+\phi_y dy=0[/tex]