A tower 100 √3  metres high cause a shadow of 100 m from its foot, the angle of elevation is.

If a pole 10 m high cause a shadow 10m long on the ground, then the sun's elevation is.

If the height and length of the shadow of a man are the same, then the angle of elevation of the sun is.

The length of shadow of a tower 50 m high at the time of the angle of elevation 45^o is.

The ratio of height of a tower and the length of its shadow on the ground is √3   :  1. Then the angle of elevation of sun is

The angle formed by the line of sight with the horizontal, when the point being viewed is above the horizontal level is called.

A tree cause a shadow 4 m long on the ground, when the angle of elevation of sun is 45^o. The height of the tree is

The length of the string flying 100 m high and angle of elevation 30^o is.

The length of the string of a kite flying at 100 metres above the ground with the elevation of 60^o is.

The value of AB in the given figure is.