Direction Command
From GeoGebra Manual
Revision as of 08:42, 23 July 2015 by Markus.winkler (talk | contribs)
- Direction[ <Line> ]
- Yields the direction vector of the line.
- Example:
Direction[-2x + 3y + 1 = 0]yields the vector u= \begin{pmatrix} 3 \\ 2 \end{pmatrix}
- Note: A line with equation ax + by = c has the direction vector (b, - a).
