- #1
d86
- 3
- 0
For tangent plane equation
z-z0 = [itex]f{x}[/itex](x0,y0)(x-x0) + [itex]f{y}[/itex](x0,y0)(y-y0)
how come there is no cross product of the partial derivatives [itex]f{x}[/itex] X [itex]f{y}[/itex] to give the normal vector for the plane?
z-z0 = [itex]f{x}[/itex](x0,y0)(x-x0) + [itex]f{y}[/itex](x0,y0)(y-y0)
how come there is no cross product of the partial derivatives [itex]f{x}[/itex] X [itex]f{y}[/itex] to give the normal vector for the plane?