Question 388927
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Hi,         
<img src=" http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Trigonometry_triangle.svg/200px-Trigonometry_triangle.svg.png ">
In this example hyp = 172ft and &#8736;A = 53° and a is the height from the ground
  sin 53° = opp/hyp = a/172ft
  172ft* sin 53° = 137.365ft = a, the height from the ground