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). A 2025-lb car has just rolled off a sheer vertical cliff (? = -90°). What is the car's grade resistance?
A. 0 lb
B. -2025 lb
C. 2025 lb
D. undefined
Answer: B
Mathematics
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