Real life example
Practical scenario - VI

(vi). Say, a flag staff of height 'h' is erected upon the top of a building of height 'x'. Say, at a distance 'd', the angles of elevation of the tops of the flag staff and building are θ_{1} and θ_{2} respectively. Then the height of the flag staff(h) and height of the building(x) are given by

**Example: ** From a point 'P' on the ground the angle of elevation of a top of a 15 m tall building is 30°. A flag is hoisted at the top of the building and the angle of elevation of the top of the flag staff from P is 60°. Find the lenght of the flag staff and the distance of the building from the point P.