A Satellite Passes Over Two Tracking Stations $A$ And $B$ $300$ Km Apart When the Satellite Is Between the Two Stations the

Essay

A satellite passes over two tracking stations, $A$ and $B$ , $300$ km apart. When the satellite is between the two stations the angles of elevation at the stations are measured as $84.5 ^ { \circ }$ and $88.2 ^ { \circ }$ respectively. What is the distance $a$ , between the satellite and station $B$ .