Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.csc ? = - 
, tan ? > 0Find cos (2?).
A. - 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve.How many lines are determined by 18 points, no 3 of them being collinear?
A. 18 B. 153 C. 2448 D. 306
Mathematics
Perform the computation.64 + (-38)
A. 102 B. -102 C. -26 D. 26
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Find the center and radius of the circle.x2 + y2 + 6x - 18y + 90 = 81
A. (-9, 3), r = 81 B. (3, -9), r = 81 C. (-3, 9), r = 9 D. (9, -3), r = 9
Mathematics
Simplify.
A. -a
B. - 
C. a
D. - 
Mathematics