Solve the problem.The grade resistance F of a car traveling up or down a hill is modeled by the equation F = W sin ?, where W is the weight of the car and ? is the angle of the hill's grade (? > 0 for uphill travel, ? < 0 for downhill travel). Find the weight of the car (to the nearest pound) that is traveling on a 
downhill grade and which has a grade resistance of 
lb.
A. 4000 lb
B. 4300 lb
C. 4100 lb
D. 3800 lb
Answer: A
Mathematics
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