Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= cscn-2 x cot x + (n - 2) 
B. 
= 
cscn-2 x cot x - 
C. 
= 
cscn-2 x cot x - 
D. 
= 
cscn-2 x cot x + 
Answer: D
Mathematics
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? 
A. 
B. 3
C. 12
D. 
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