Section 10.3
Application of Differential Calculus of Multivariable Function in Geometry
Overview
CURVE
SURFACE
1)  Tangent line and normal plane
2) Tangent planes and normal lines
The Parametric Equations of a Space Curve
We already know that a plane curve can be represented by a parametric
by a parametric equations
, a line in space can be expressed
equations
or
of the variable point P(x,y,z).