Evaluate the integral.
A. 
sec2x - 9 ln
+ C or 
tan2x - 9 ln
+ C
B. 
sec2x - ln
+ C or 
tan2x - ln
+ C
C. 7 sec2x + 9 ln
+ C or 7 tan2x + 9 ln
+ C
D. 
tan2x - 9 ln
+ C or 
tan2x + 9 ln
+ C
Answer: A
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