Question

the angle of elevation of the top of a tower from two points points at a distance of 4 m and 9 M from the base of the tower and in the same straight line with it are complementary prove that the height of the tower is 6 m

Answer 1

Let AB be the tower and two points c and D are are 4m and 9m from the base of the tower respectively.This implies that CD will be (9-4)m i.e 5m automatically.