Find the exact value using a double-angle identity.cos(450°)
A. 
B. -1
C. - 
D. 0
Answer: D
Mathematics
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Factor.2x2 - 12x + 16
A. 2(x - 8)(x + 1) B. Prime C. (2x - 4)(x - 4) D. 2(x - 2)(x - 4)
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Combine the following, if possible.6
+ x
A. 7x5 B. 6x5 C. 6x9 D. 6x5 + x4
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Find the center and radius of the circle with the given equation. (x + 2.4)2 + 
2 = 
A. (0.75, -2.4); r = 
B. (0.75, 2.4); r = 
C. (2.4, -0.75); r = 
D. (-2.4, 0.75); r = 
Mathematics
Name the quadrant in which the angle ? lies.tan ? < 0, sin ? < 0
A. I B. II C. III D. IV
Mathematics