Trigonometry question

Question

A surveyor in an airplane is flying towards a lake. She observes that the angles of depression to the near side of the lake and the far side of the lake are 45° and 32° respectively. At that moment, her airplane is exactly 9750m from the near side of the lake. Determine the width of the lake to the nearest meter.

answer is 4139m

cant figure out how to do it

Answer 1

Follow the method demonstrated in John P.'s video.