Question

You are stationed at a radar base in Warner Robins, GA and you observe an unidentified flying object at an altitude of 2000 m flying towards your radar base at an angle of 20 degrees. How far away from the radar base is that plane (hypotenuse)?
Reiny
Once you made your diagram, and let the hypotenuse equal to h, this becomes a basic case of solving

sin 20ยบ = 2000/h for h