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26 March, 12:25

Cleo is looking at an airplane flying at an altitude of 3 miles. Her angle of elevation is 37 degrees. About how far is the land distance from Cleo to the plane?

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  1. 26 March, 15:16
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    Think of a right triangle, with 3 miles being the length of the vertical leg and x the length of the horiz. leg. Then tan 37 deg = opp / adj, or

    tan 37 deg = 3 mi / adj, so that adj = (3 mi) / (tan 37 deg) = (3 mi) (0.754)

    = 2.26 miles
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