In traveling across flat land you notice a mountain directly in front of you. Its angle of elevation is 3.5 degrees. After you drive 13 miles closer to the mountain the angle of elevation is 9 degrees. Approx. the height of the mountain.

Is this problem able to be solved with out the law of sines? I can solve this problem if I use the law of sines and get the Hypotenuse, then use Cos(9)=y/hypot.

Thank you