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TURN DOWN FOR WHAT!!!
@jhonyy9
Well for part a, a triangle has a total of 180 degrees. Knowing it is a right triangle you can automatically subtract 90 from 180. You know the angle in the triangle is 30 degrees so subtract 30 from the remaining 90 and you get 60. Angle e is 60 degrees.
http://www.virtualnerd.com/algebra-1/radical-expressions-equations/pythagorean-theorem/trigonometric-ratios/sine-find-missing-side this should help with the last parts
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