Tangent and Normal
Tangent and Normal: Overview
This topic covers concepts such as Tangents and Normals, Geometrical Meaning of Derivative of a Function, Tangent to a Curve, Slopes of Tangent at a Point on a Curve y=f(x), Equations of Tangent at a Point on a Curve y=f(x), etc.
Important Questions on Tangent and Normal
The equation of a tangent to the curve which is parallel to the line would be

If a line is a tangent to the ellipse , then can not be equal to :

The number of parallel tangents of and is

The tangent to a given curve is perpendicular to -axis if

The tangent to the curve at meets the curve again at the point

Find the slope of tangent to the curve at .

The equation of the tangent to the curve at the point of intersection with the -axis, is

The points on the curve at which the tangent is parallel to -axis are

Find the slope of the tangent to the curve at .

Equations of tangents to the ellipse at the points whose ordinates is

The equation of the normal to the curve which are parallel to the line is

Find the equation of the tangent to the curve

Find the equation of tangent and normal to the curve at the indicated point on it.

Find the equations of tangent and normal to the curves at the indicated point on it.

The equation of tangent of a curve which is parallel to the line is

If the line touches the curve at the point , then

Let be a bijection. A curve represented by is such that The tangent and normal drawn at on the curve cuts the -axis at respectively and is the foot of the perpendicular from onto the -axis. If is such a point that is minimum, then the tangent at is parallel to the line

The equation of the normal to the curve at any point is

The curve touches the -axis at and cuts -axis at a point , where gradient is Then the values of are

If the tangent to the curve meets the -axis at and -axis at then
