Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Answer: C
Mathematics
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What fraction of a complete revolution is the following angle?
A. 
B. 
C. 
D. 
Mathematics
The number of viewers of a television series introduced several years ago is approximated by the function 
, where N(t) (measured in millions) denotes the number of weekly viewers of the series in the t th week. Find the rate of increase of the weekly audience at the end of week 12.
?
A. 13.439 million/wk B. 3.360 million/wk C. 0.529 million/wk D. 0.132 million/wk E. 25.398 million/wk
Mathematics
Simplify.(x - 6)8 ? (x - 6)7
A. (2x - 12)15 B. (x - 6)15 C. (x - 6)56 D. (2x - 12x + 36)56
Mathematics
Find the center and radius of the circle.4x2 + 4y2 - 8x - 16y - 16 = 0
A. (1, 2), r = 3 B. (-1, -2), r = 9 C. (-2, -1), r = 9 D. (2, 1), r = 3
Mathematics