Jeff is a camera man shooting different scenes for an action movie.
The height from the balcony to the camera is 20 feet and the camera is held 30 feet away. Jeff uses tan^-1(20/30) to figure out that he needs to point the camera at a 33.7 degrees for the actor to be in view.
Now Jeff needs to do a shot from a higher point of view where he holds the camera at a 40 degree angle. while the actors are 15feet away from the building. After doing 15/tan(40) he finds that he needs to set the camera 18ft high which would be on the 3rd floor.