Homework Help: trig

Posted by sanam on Sunday, October 2, 2011 at 4:44am.

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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.

trig - drwls, Sunday, October 2, 2011 at 7:19am
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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