Question: The force F (in pounds) on a person's back when he or she bends over at an angle from an upright position is modeled by

The force F (in pounds) on a person's back when he or she bends over at an angle from an upright position is modeled by

0.6W sin(0 F + 90°) sin 12°

where W represents the person's weight (in pounds).
(a) Simplify the model.
(b) Use a graphing utility to graph the model, where W = 185 and 0° 

(c) At what angle is the force maximized? At what angle is the force minimized?

0.6W sin(0 F + 90) sin 12

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