Category:Direction Ratios

This category contains results about Direction Ratios.
Definitions specific to this category can be found in Definitions/Direction Ratios.

Let $\LL$ be a line embedded in a Cartesian $3$-space.

Let $l$, $m$ and $n$ be the direction cosines of $\LL$ with respect to the $x$-axis, $y$-axis and $z$-axis respectively.

Direction ratios of $\LL$ are the three numbers in the ratio $l : m : n$.