Solution of Rig...

A boy is standing at some distance from a 60 m tall building such that angle of elevation of the top of the building from the boy is 30^o. He moves x metre close to the building such that angle of elevation is now 60^o. Find the value of x.

A boy is standing at a distance of 6 feet from a 10 feet long wall. The angles of elevation of the top of the wall from head and foot of the boy areθ andϕ, respectively such that tanϕ = 2 tanθ​​​​​​​. Find the height of the boy(in feet).

If a ladder makes an angle 45^o with a wall and reaches a height of 15 feet, the length of the ladder is