Question: The Willis Tower in Chicago can be seen from a point on the ground known to be 5200 ft from the base of the tower.

The Willis Tower in Chicago can be seen from a point on the ground known to be 5200 ft from the base of the tower. The angle of elevation from the observer to the top of the tower is 16°. How high is the Willis Tower? See Fig. 4.50.

h B 5200 ft Fig. 4.50 16 0

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