Express the product as a sum containing only sines or cosines.2 cos (7?) cos ?
A. cos (10?) + sin (4?)
B. cos (8?) + cos (6?)
C. cos (8?) + sin (6?)
D. cos (14?) + cos (2?)
Answer: B
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Find the common ratio for the geometric sequence.6, -0.6, 0.06, -0.006, . . .
A. -0.1 B. -0.01 C. -1 D. 0.1
Write a formula for the general term, or nth term, for the given sequence.-4, 16, -64, 256, -1024, . . .
A. an = (-1)n(4)n B. an = (-1)n - 1(4)n C. an = (-1)n(4n) D. an = -4 + 12(n - 1)
For the parametric equations given, use a graphing calculator to generate the curve over the stated interval for the parameter t. Use the window specified. Also, find a rectangular equation for the curve.x = ln(t - 2), y = 3t + 1, for t in (2, 10]
A. 
The rectangular equation for the curve is
y = ex + 7, for x in [-?, ln 8].
B. 
The rectangular equation for the curve is
y = 3ex + 7, for x in [-?, ln 8].
C. 
The rectangular equation for the curve is
y = 3ex - 7, for x in [-?, ln 8].
D. 
The rectangular equation for the curve is
y = 3ex + 2, for x in [-?, ln 2].
Use a graphing calculator to solve the equation. Round to three decimal places, if necessary.1.1x + 2.9 = 0.7x - 0.62
A. x = -8.800 B. x = 0.114 C. x = -8.888 D. x = -8.810