A patrol car is parked 50 feet from a long warehouse (see figure). The revolving light on top of the car turns at a rate of 40 revolutions per minute. Write @ as a function of x. 8(x) = X How fast is the light beam moving along the wall when the beam makes an angle of 0 = 450 with the line perpendicular from the light to the wall? dx/dt = ft/min X 50 ft -X