Complete the identity.sin ? [sin(4?) + sin 6?)] = ?
A. 
cos ? [cos(4?) + cos(6?)]
B. 
cos ? [cos(4?) - cos(6?)]
C. cos ? [cos(4?) - cos(6?)]
D. cos ? [cos(4?) + cos(6?)]
Answer: C
Mathematics
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= 
A. x = 
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B. x = 
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Simplify the expression by combining like terms.9b - 2b
A. -11b B. 7b C. 7b2 D. -7b
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Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = 
A. 
B. 
C. 
D. 
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