Conic Sections https://www.youtube.com/watch?v=5kM39HZDQ5sDefinition: The curves obtained by intersection of a plane and a double cone in different orientation are called conic section.Definitions of various important terms:Focus: The fixed point is called the focus of the conic-section.Directrix: The fixed straight line is called the directrix of the … [Read more...] about Conic Sections