Given an example of a horizontal plane and a vertical plane from your environment.

Give two examples each of right, acute and obtuse angles from your environment.

Given three examples each of : (a) intersecting lines (b)parallel lines from your environment.

Give three examples of angles from your environment.

Given an example of a point from your surroundings.

A vertical tower sands on a horizontal plane and is surmounted by a vertical flag staff of height hdot At a point on the plane, the angles of elevation of the bottom and the top of the flagstaff are alpha and beta .Prove that the height of the tower (htanalpha)/(tanbeta-tanalpha)

A vertical tower sands on a horizontal plane and is surmounted by a vertical flag staff of height hdot At a point on the plane, the angles of elevation of the bottom and the top of the flag are beta and alpha . then height of tower equal to

The differential equation of all non-horizontal lines in a plane is

Give three examples of line segments from your environment.

A particle is projected from the horizontal x-z plane, in vertical x-y plane where x-axis is horizontal and positive y-axis vertically upwards. The graph of y coordinate of the particle v/s time is as shown . The range of the particle is sqrt3 . Then the speed of the projected particle is:

A vertical tower Stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angles of Elevation of the bottom and the top of the flag staff are alpha and beta respectively Prove that the height of the tower is (htanalpha)/(tanbeta - tanalpha)