$\"\"$

Willis Tower height is $\"\"$ .

The angle of inclination from the base of the John Hancock Center to the top of the main structure of the Willis Tower is $\"\"$ .

Let $\"\"$ be the distance between John Hancock Center and Willis Tower .

Draw the diagram for the situation:

$\"\"$

From above figure

$\"\"$

$\"\"$ .

Distance between John Hancock Center and Willis Tower is $\"\"$ .

$\"\"$

Distance between John Hancock Center and Willis Tower is $\"\"$ .