Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cscn-2 x cot x - 
B. 
= 
cscn-2 x cot x + 
C. 
= cscn-2 x cot x + (n - 2) 
D. 
= 
cscn-2 x cot x - 
Answer: B
Mathematics
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A. 1
B. 
C. 
D. 
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?
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A. 
B. 
C. 
D. 
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