On a horizontal plane there is a vertical tower with a flagpole on the top of the tower At a point 9......

On a horizontal plane there is a vertical tower with a flagpole on the top of the tower. At a point, 9 meters away from the foot of the tower, the angle of elevation of the top and bottom of the flagpole are 60° and 30° respectively. Find the height of the flagpole.

Let OX be the horizontal plane, AD be the tower and CD be the vertical flagpole
We have:

By: Amit Kumar