A student is trying to calculate the height of a tree. She measures the shadow to be 15 yards long at 3:00 p.m. At this time the angle of elevation of the sun is appoximately 68 degrees. How tall is the tree?

Answer 1

tan 68 = height/15
height is then in yards, if you want feet multiply by three.

Answer 2

A bird sits on top of a lamppost. The angle of depression from the bird to the feet of an observer standing away from the lamppost is 35 degrees. The distance from the bird to the observer is 25 meters. How tall is the lamppost?