If x = 3 cot ?, use trigonometric substitution to write 
as a trigonometric function of ?, where 
.
?
A. ?3 sec ?
B. ?3 csc ?
C. ?3 cos ?
D. ?3 sin ?
E. ?3 cot ?
Answer: B
Mathematics
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Evaluate the sum.
?
?
Please enter your answer as a fraction.
What will be an ideal response?
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