Use reduction formulas to evaluate the integral.
A. - 
cot3 4x + 
cot 4x + x + C
B. - 
cot3 4x + 
cot 4x + C
C. - 
cot2 4x + 
cot 4x - x + C
D. - 
cot3 4x - 
cot 4x + x + C
Answer: A
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A. 
B. 
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D. 
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