From an airplane that is flying at an altitude of 3,000 feet, the ange of depression of an airport ground signal measures 27" Find to the nearest foot, the distance between the airplane and the airport signal.
see the attached figure to better understand the problem
we have that
sin(27)=3,000/D ------> by opposite side divided by the hypotenuse
solve for D
D=3,000/sin(27)
D=6,608 ft