Mathematics
The angles of elevation of the top of a tower from two points on the ground at distances a metres and b metres from the base of the tower and in the same straight line with it are complementary. Prove that the height of the tower is metres.
Related Questions
From two points A and B on the same side of a building, the angles of elevation of the top of the building are 30° and 60° respectively. If the height of the building is 10 m, find the distance between A and B, correct to two decimal places.
A man in a boat rowing away from a lighthouse, 150 m high, takes 1.5 minutes to change the angle of elevation of the top of the lighthouse from 60° to 45°. Find the speed of the boat.
Two pillars of equal heights stand on either side of a roadway, which is 120 m wide. At a point on the road lying between the pillars, the elevations of the pillars are 60° and 30° respectively. Find the height of each pillar and the position of the point.