Ellipse, Anellipseis the set of points in a plane whose distances from two fixed points in the plane have a constant sum. The two fixed points are thefociof the ellipse.The line through the foci of an ellipse is the ellipse’s focal axis. The point on the axis halfway between the foci is thecenter. The points where the focal axis and ellipse cross are the ellipse’svertices

Hyperbola, Ahyperbolais the set of points in a plane whose distances from two fixed points in the plane have a constant difference. The two fixed points are the fociof the hyperbola.The line through the foci of a hyperbola is thefocal axis. The point on the axis halfway between the foci is the hyperbola’s center. The points where the focal axis and hyperbola cross are thevertices.

Multivariable calculus in Hindi Urdu

Vectors

A quantity such as force, displacement, or velocity is called a vector and is represented by directed line segment.The arrow points in the direction of the action and its length gives the magnitude of the action in terms of a suitably chosen unit. For example, a force vector points in the direction in which the force acts; its length is a measure of the force’s strength; a velocity vector points in the direction of motion and its length is the speed of the moving object.