1. Two angles of elevation from opposite sides of the helicopter, and from 200 feet apart, are 12.3 degrees and 17 degrees. how high is copter off ground?
2. Angle of elevation to top of the building, from the point A which is across the street and 23 feet above ground, is 37 degrees. From point B, which is 41 feet vertically above point A, angle of elevation to top of building is 22 degrees. How tall, h, is building?