# precalculus

A radio tower is located 450 feet from a building. From a window in the building, a person determines that the angle of elevation to the top of the tower is
24

and that the angle of depression to the bottom of the tower is
21

. How tall is the tower?

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1. 450 tan(24º) + 450 tan(21º)

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2. Tan21 = 450/x
X = 1172 Ft. = hor. distance between bldg. and tower.

Tan24 = h1/1172
h1 = 1172*Tan24 = 522 Ft.
ht. = 522 + 450 =

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