Write the sum or difference as a product containing only sines and/or cosines.sin(10?) - sin(4?)
A. 2 sin(3?)
B. 2 sin(3?) cos(7?)
C. 2 cos(4?) cos(7?)
D. 2 sin(7?) cos(3?)
Answer: B
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Solve the problem.You just put $1140 in a CD that is expected to earn 3% compounded quarterly, and 
in a savings account that is expected to earn 2% compounded semiannually. Determine when, to the nearest year, the values of your two investments will be the same.
A. 426 years B. 327 years C. 131 years D. 229 years
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log4(16x)
A. 2 log4 x B. 8 + log4 x C. 2x D. 2 + log4 x
Evaluate the radical function at the indicated value.f(x) = -
f(21)
A. -6 B. 42 C. -36 D. 6
Factor out the greatest common factor.-60x8y7 + 36x4y4 + 48x6y2
A. -x4y2(60x4y5 - 36y2 - 48x2) B. -12(5x8y7 - 3x4y4 - 4x6y2) C. -12x4y2(5x4y5 - 3y2 - 4x2) D. -12x4(5x4y7 - 3y4 - 4x2y2)