Complete the identity.sin (? + ?) + sin (? - ?) = ?
A. 2sin ? cos ?
B. cos ? cos ?
C. 2cos ? cos ?
D. sin ? cos ?
Answer: A
Mathematics
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Add or subtract, as indicated.(4x2y - 6xy) - (6x2y + 4xy2) - (2xy + 4xy2)
A. -6x2y - 4xy2 - 8xy B. -2x2y - 8xy2 - 8xy C. -2x2y + 8xy2 - 8xy D. -2x2y + 8xy2 - 4xy
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A. -44 B. 52 C. 44 D. -52
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Determine the equation of the line.
A. y = 2x
B. y = 5x + 2
C. y = 
x + 2
D. y = 2x + 
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