Two radar station 18.5 miles apart are tracking a plane. The angle of elevation from station A is 48 and the angle of elevation from station B is 74. How far is the plane from station B?
see the attached figure to better understand the problem
we know that
in the triangle ABC angle C=180-(48+74)------> angle C=58° applying the law of sines BC/sin 48=18.5/sin 58°------> BC=18.5*sin 48/sin 58-----> BC=16.21 miles
