A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 6.6 km apart, to be 37° and 44°, as shown in the figure. Find the distance of the plane from point A, and the elevation of the plane.

Answer 1

I assume A is the closer one
call plane location C
call ground directly under plane D
call altitude h
Angle CAD = 44
Angle CBD = 37
tan 37 = h/(da +6600)
tan 44 = h/(da)