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posted by sanam .
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The angle of elevation to the top of a very tall Building is found to be 7° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building.

Draw yourself a picture
Let building height = y
Distance from observer to base = x
= 1 mile = 5280 feet
y/x = tan(7deg) = 0.12278
y = 648.3 feet
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