A man on the top of a lighthouse observes a ship approaching directly towards him at a uniform speed. If it took 8 minutes for the angle of depression to …

A bird is flying horizontally 300 meters above ground, when observed first by a person on the ground; the angle of elevation of the bird for the person ground is …

Two cars are approaching a watchtower from two opposite directions. The angle of elevation of the top of the watchtower as observed by the drivers are 300 and 450 If …

The angles of the triangle are in A.P, the smallest angle being one-third of the greatest angle; the length of the longest side is 10 meters. The perimeter of this …