The polar equation of the graph is either r = a + b cos ? or r = a + b sin ?, a > 0, b > 0. Match the graph to one of the equations. 
A. r = 4 + 2 cos ?
B. r = 4 + 2 sin ?
C. r = 2 + 4 sin ?
D. r = 2 + 4 cos ?
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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