Question

what is directrix ?

Answer 1

the directrix has to do witha parabola. A parabola is a plane curve with the property that each of its points is equidistant from a given fixed point and a given fixed line. The fixed point is called the line and the fixed line is called the directrix

Answer 2

@LagrangeSon678
So far as i know, ellipse and hyperbola too have directrix!

Answer 3

\[Directrix\ is\ a\ line \ from\ a\ fixed\ point\ with\ a\ fixed\ distance\]