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Two buildings of equal height are 780 feet apart. An observer on the street between the buildings measures the angles of elevation to the tops of the buildings as 31 degrees and 41 degrees. How​ high, to the nearest​ foot, are the​ buildings?

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Because the angles are not the same (even though the heights of the buildings are), we know that the observer isn’t standing exactly halfway between both buildings. The building closest to the observer will correspond to the higher angle. It might help to assign variables at this point—say, X for the observer, A for the distance to...

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