Complete the identity.sin ? [sin(3?) + sin 5?)] = ?
A. cos ? [cos(3?) - cos(5?)]
B. 
cos ? [cos(3?) - cos(5?)]
C. 
cos ? [cos(3?) + cos(5?)]
D. cos ? [cos(3?) + cos(5?)]
Answer: A
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Find the sum or difference.(5x4 - 9x2 + x) - (2x3 + 8x2 + 3x) + (4x2 - x)
A. 11x5 + 7x4 - 3x B. 5x4 - 2x3 - 13x2 - 3x C. 5x4 + 2x3 - 21x2 - 3x D. 5x4 - 2x3 - 11x2 + 3x
Find the derivative of the function.y = x2 ln x2
A. 2x + ln x2
B. 
C. 2x(1 + ln x2)
D. 2(x + ln x)
State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not.f(x) = -10x5 + ?x4 - 
A. Yes; degree 5 B. Yes; degree 10 C. No; x4 has a non-integer coefficient D. Yes; degree 9
Solve the problem.The following table lists the monthly precipitation P, in inches, in Salem, Missouri, where 
corresponds to January and x = 9 corresponds to September.
Determine the value of P during September.
A. 2.4 inches B. 1.2 inches C. 1.7 inches D. 1.4 inches