anonymous
  • anonymous
the arm of a steel crane is 52feet long.when it is fully extended the crane arm forms a 30 degree angle with a line parallel to the ground . how many feet above the ground is the top of the crane ?
Mathematics
chestercat
  • chestercat
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dumbcow
  • dumbcow
let h be the height of the crane sin30 = opp/hyp sin30 = h/52 h = 52*sin30 --> sin30 = 1/2 (use unit circle or calc) h = 52*1/2 h = 26

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