Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.sin 
A. - 
B. 
C. - 
D. -1
Answer: C
Mathematics
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Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the difference.7 - 9
A. 16 B. 2 C. -16 D. -2
Mathematics
Evaluate the determinant.
A. -144 B. 144 C. -4 D. -12
Mathematics
Find the center and radius of the circle.x2 + y2 = 49
A. Center: (1, 1), radius: 49 B. Center: (0, 0), radius: 49 C. Center: (0, 0), radius: 7 D. Center: (1, 1), radius: 7
Mathematics