From the top of an electric post, two wires are stretched to either side and fixed to the ground, 25 meters apart. The wires make angle `55^circ`and `40^circ`with the ground. What is the height of the post?

A child stands 30 metres away from the foot of a telephone tower, sees the top of the tower at an angle of elevation 30^circ . Stepping some distance towards the tower, sees it at an elevation of 45^circ a) What is the height of the tower? b) How much distance did he walk?

A man 1.8 metre tall standing a the top of a telephonetower, saw the top of a 10 m high building at a depression of 40^circ and the base of the building at a depression of 60^circ . What is the height of the tower? How far is it from the building?

Two poles of height 3 m and 2m are erected upright on the ground and ropes are stretched from the top of each to the foot of the tower. At what height above the ground do the ropes cross each other. .

Two poles are erected upright on the ground and ropes are stretched from the top of each to the foot of the tower. Taking the heights of the poles as 'a' and 'b' and height above the ground of the point where the ropes cross each other as h, find the relation between a,b and h. .

Two children of same height standing on either sides of a tower, looks the top of tower at an elevation of 40^circ , 55^circ . The distance between the children is 25 metres. Height of the chlidren is 1.5 metres. a) Draw a rough figure showing the givën measurements. b) Calculate the height of the tower. [sin 40^circ =0.64, sin 55^circ =0.82, cos 40^circ =0.77, cos 55^circ =0 .57, tan 40^circ =0.89, tan 55^circ =1.43]

A ladder leans against a wall, with its foot 2 metres away from the wall and the angle with the floor is 40^circ . How high is the top end of the ladder from the ground?

Two poles of height 3 m and 2m are erected upright on the ground and ropes are stretched from the top of each to the foot of the tower. Prove that this height would be the same whatever be the distance between the poles. .

Two buildings in a plane ground are 20 metres apart. From the top of the smaller building, one sees the base of the building at a depression of 50^circ and its top at an elevation of 25^circ . a) Draw a rough figure and mark the measurements. b) Find the helght of the smaller building. c) Find the height of the bigger building. '[tan 50^circ=1.2, tan 25^circ=0.4]'