A communications satellite is directly above the extension of a line between receiving towers A and B. It is determined from radio signals that the angle of elevation from tower A is 88.9 degrees and the angle of elevation from tower B is 87.4 degrees. If A and B are686 kmapart, how far is the satellite fromA?

(Ignore the curvature of theearth.)

distance =

nothing

km

(Round to the nearest thousand asneeded.)