I need some clarification on what being parallel to the xy, yz, and zx planes would mean when you are talking about parametric and symmetric equations.

Printable View

- Sep 21st 2013, 01:51 PMshmiksparalell to xy, yz, xz plane
I need some clarification on what being parallel to the xy, yz, and zx planes would mean when you are talking about parametric and symmetric equations.

- Sep 21st 2013, 02:07 PMPlatoRe: paralell to xy, yz, xz plane
The line $\displaystyle \ell(t):P+\vec{D}t$ is parallel to the $\displaystyle xy\text{-plane}$ provided $\displaystyle \vec{D}\cdot \vec{k}=0$.

The plane $\displaystyle (z-c)=0$ is parallel to the $\displaystyle xy\text{-plane}$.

There are similar statement for the other coordinate planes.