Find the exact value of the expression. Do not use a calculator.cos 120° tan 60°
A. 
B. - 
C. 
D. - 
Answer: B
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Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (x + 8) sin x
A. sin x ln (x + 8)
B. (x + 8) sin x
C. 
(x + 8) sin x
D. cos x ln (x + 8) + 
Solve the problem.Jack has 82 trees that he wants to plant in a rectangular array. List the possible arrays.
A. 2 × 41, 41 × 2 B. 1 × 82, 2 × 41 C. 1 × 82 D. 1 × 41, 2 × 41
Solve the problem.The number of traffic accidents has been decreasing in a certain county each year. The data is shown in the table for several recent years. The set of data can be approximated with a linear equation.
Find an equation of the line.
A. y = -78x + 625 B. y = -78x + 615 C. y = 78x + 625 D. y = -88x + 625
Graph the function.y = 
cot 
A. 
B. 
C. 
D. 