Find the exact value in degrees.cos-1 
A. 45°
B. 30°
C. 315°
D. 330°
Answer: B
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Solve.The temperature at 5:00 was -2° C. Four hours later, it was -12° C. What was the change in temperature?
A. -14° C B. -10° C C. 14° C D. 10° C
Find the domain of the composite function f?g. Write the domain in interval notation.f(x) = 2x + 12; g(x) = 
A. [-6, ?) B. (-?, -6] ? [0, ?) C. [0, ?) D. (-?, ?)
Find the exact value of the trigonometric expression without the use of a calculator.sec
A. - 
B. 
C. - 
D. - 
Use either the binomial theorem or Pascal's Triangle to expand the binomial.(x + 2y)6
A. x6 + 12x5y + 60x4y2 + 160x3y3 + 240x2y4 + 192xy5 + 64y6 B. x6 + 12x5y + 64x4y2 + 40x3y3 + 64x2y4 + 12xy5 + 2y6 C. x6 + 12x5y + 48x4y2 + 144x3y3 + 192x2y4 + 192xy5 + 64y6 D. x6 + 12x5y + 24x4y2 + 36x3y3 + 24x2y4 + 12x y5 + 2y6