Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 165°
A. -2 + 
B. 2 - 
C. -2 - 
D. 2 + 
Answer: A
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Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = ?/6 to x = ?/2. The cross sections perpendicular to the x-axis are circular disks with diameters running from the curve 
to the curve 
A. (
- 1) ? + 
B. 
- 
C. 
- 
D. (2
- 2) ? - 
Simplify.
A. -m - 4 B. m C. -m D. m + 4
Solve the problem.A drugstore sells two types, A and B, of humidifiers. Each humidifier of type A and type B costs $10 and $20, respectively. The store wants at least 8 humidifiers in stock and does not want its investment in the humidifiers to exceed $1000. Graph the possible inventory of the humidifiers and find the vertices. 
A. 
B. 
C. 
D. 
Find the derivative of f at the given point.f(x) = x2 + 3x + 16 at x = 7
A. 14 B. 5 C. 3 D. 17