Evaluate the integral.Use the formula
to evaluate the integral. 
A. x cot-1 x + ln sin(cot-1 x) + C
B. x cot-1 x - x + C
C. x cot-1 x - ln sin(cot-1 x) + C
D. x cot-1 x - ln sin x + C
Answer: C
Mathematics
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Simplify.-|-6|
A. - 
B. 0
C. 6
D. -6
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Find the exact value of the trigonometric function.sin 
A. - 
B. - 
C. 
D. 
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Factor the polynomial function.H(a) = a3 - 4a2 - 4a + 16
A. H(a) = (a + 4)(a + 2)(a - 2) B. H(a) = (a - 4)(a - 2)2 C. H(a) = (a - 4)(a + 2)2 D. H(a) = (a - 4)(a + 2)(a - 2)
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Write a positive or negative fraction to describe the situation.Over last summer, 
of the teachers' desks were removed from the school.
A. - 
B. 
C. - 
D. 
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