The angle of elevation (depression) is the angle formed by a horizontal line and a line joining
the observer’s eye to an object above (below) the horizontal line. Two people are on the roof of
buildings separated by at 25 foot wide road. Person A is 100 feet above Person B and drops a
rock off the roof of their building and it falls at a rate of 3 ft/sec.
(a) At what rate is the angle of elevation changing as Person B watches the rock fall when the
rock is 25 feet above Person B?
(b) At what rate is the angle of depression changing as Person B watches the rock fall when the
rock is 65 f

Question

The angle of elevation (depression) is the angle formed by a horizontal line and a line joining
the observer’s eye to an object above (below) the horizontal line. Two people are on the roof of
buildings separated by at 25 foot wide road. Person A is 100 feet above Person B and drops a
rock off the roof of their building and it falls at a rate of 3 ft/sec.
(a) At what rate is the angle of elevation changing as Person B watches the rock fall when the
rock is 25 feet above Person B?
(b) At what rate is the angle of depression changing as Person B watches the rock fall when the
rock is 65 f