Directrix Command
From GeoGebra Manual
Revision as of 09:08, 17 August 2015 by Markus.winkler (talk | contribs)
- Directrix[ <Conic> ]
- Yields the directrix of the conic.
- Example:
Directrix[x^2 - 3x + 3y = 9]
yields the line y = 4.5
Note: See also the Focus command.