3.0.As a section of a cone. Definition of Foci, Directrix, Latus Rectum. PS = ePL where P is a point on the conics, S is the focus, PL is the perpendicular distance of the point from the directrix.
3. Conics

3.0.As a section of a cone. Definition of Foci, Directrix, Latus Rectum. PS = ePL where P is a point on the conics, S is the focus, PL is the perpendicular distance of the point from the directrix.