Co ordinate geometry : - ( Condition of tangency of an ellipse and a line ) - 105.

Co ordinate geometry is one of the most important and exciting ideas of mathematics. It provides a connection between algebra and geometry through graphs of lines and curves.
The Conic section is the intersection of a plane and a cone.
An ellipse is the locus of a point which moves so that its distance from a fixed point (focus) bears a constant ratio to its fixed straight line (directrix). This ratio is called eccentricity e .It is always less than 1. Condition of a line and an ellipse.
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