Getting the Best View
A 6 foot tall painting is placed on the wall so that the very bottom of the painting sits 7 feet above the floor. Suppose your eyes are 5 feet above the floor and that you are standing 6 feet from the painting. Let T be your line of sight with the top of the painting and B be your line of sight with the bottom of the painting. At what rate is the angle formed by T and B changing (in radians per second) as you approach the painting at 3 feet per second?