The function graphed is of the form y = a sin bx or y = a cos bx, where b > 0. Determine the equation of the graph.
A. y = 4 cos (3x)
B. y = -4 cos (3x)
C. y = 4 cos 
D. y = 4 sin 
Answer: C
Mathematics
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A. 
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D. 
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