4.) Anoki wants to determine the height of a vertical lighthouse, shown below. He measures the angle of elevation to the top of the lighthouse at a point 103 feet along level ground from the center of the base of the
lighthouse. The angle of elevation is 31º. Which of the following expressions gives the best approximation
of the height of the lighthouse, in feet?
D. 103 cos 31°
cos 31°
A.
103
tan 31°
B.
103
C. 103 sin 31°
E. 103 tan 31°
310
103