Express the product as a sum containing only sines or cosines.cos 
cos 
A. 
[cos(5?) - sin(4?)]
B. 
cos2(9?)
C. 
[cos(4?) + cos(5?)]
D. 
[cos(10?) - sin(8?)]
Answer: C
Mathematics
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Express the number as the ratio of two integers.0.272727 . . .
A. 
B. 
C. 2
D. 
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Simplify the following by combining like terms.4m4 + 2m4
A. 6m8 B. 24m C. 6m4 D. cannot be simplified
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Give the equation of the horizontal asymptote, if any, of the function.f(x) = 
A. y = 2 B. y = 7 C. y = 1 D. no horizontal asymptotes
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Factor completely. Make sure you factor out the GCF first if possible. If prime, so state.81x2 + 72xy + 16y2
A. (81x + y)(x + 16y) B. (9x + 4y)2 C. (9x + 4y)(9x - 4y) D. (9x - 4y)2
Mathematics