Parabola and a Line
Parabola and a Line: Overview
This topic covers concepts, such as, Parabola and a Line, Position of a Line with Respect To a Parabola, Chords of the Parabola & Equation of Chord Joining Two Points of Parabola etc.
Important Questions on Parabola and a Line
Equation of chord of the parabola whose midpoint is is

Slope of the chord of parabola which passes through the point and which subtends an angle of at the vertex, is

Let a parabola be . Then the image of the parabola formed by the line mirror , is

The line touches the parabola . The coordinates of a point on this line from which the tangent to is perpendicular to the line is

From the focus of the parabola, as centre, a circle is described so that a common chord of the curves is equidistant from the vertex & focus of the parabola. Find the equation of the circle.

Through the vertex of the parabola variable chords and are drawn at right angles. If the variabte chord intersects the axis of at then prove that distance is equal to latus rectum of the parabola.

If the line is a tangent to the parabola with as directrix, then the value of is

An equilateral triangle is inscribed in the parabola and one of the sides of the equilateral triangle has the gradient . If the sum of -coordinates of all the vertices of the triangle is expressed in the form of (where are coprime natural number), then the value of is

A straight line is drawn through the point at an angle of with the positive direction of the - axis to cut the parabola at the points and . If the value of then

A line passing through cuts parabola at . Then which is false ?

A line through the origin intersects the parabola at two points whose -coordinates add up to . Then the slope of the line is :

From the point the tangents and are drawn to the circle If point lies on the circle, then the square of the maximum area (in sq. units) of is equal to

The vertices of the base of an isosceles triangle lie on a parabola and the base is a part of the line . If the third vertex of the triangle lies on the -axis, its coordinates are

If is a point on the parabola and is the point , then the locus of the midpoint of the line segment is

If and form a geometric progression with common ratio then the sum of the ordinates of the points of intersection of the line and the curve is

If is a point on the ellipse then the area of

Chords of an ellipse are drawn through the positive end of the minor axis. Then locus of mid point of chords must be

Equation of chord of the parabola whose mid point is, is

The mirror image of the directrix of the parabola in the line mirror is

In the parabola , the length of the chord passing through the vertex inclined to its axis at is
