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In this diagram, one person is standing at point A, one person is at point B, and both are looking at a helicopter at point C. The helicopter is 1000 feet above the ground on which the two people are standing.

A. If the angle of elevation at point A is 60 degrees and the angle of elevation at point B is 20 degrees, approximately how many feet apart are A& B?

  • Math -

    x=x₁+x₂= 1000sin60 =100sin20=
    =1000(0.866+0.342)=1208 feet

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