A 3 m long ladder leans on the wall such that its lower end remains 1.5 m away from the base of the wall. Then, the ladder makes an angle of measure ……… with the ground.

On walking ……….. metres on a hill making an angle of measure 30 with the ground, one can reach the height of 'a' metres from the ground.

The angle of elevation of the top of the tower from a point P on the ground has measure 45. The distance of the tower from the point P is a and height of the tower is b. Then, ……….

A tower is 50√3 m high. The angle of elevation of its top from a point 50 m away from its foot has measure

If the ratio of the height of a tower and the length of its shadow is 1 : √3, then the angle of elevation of the sun has measure ………….