Write the expression in terms of sines and/or cosines, and then simplify.
A. 
B. 
C. 
D. cos x - sin x
Answer: B
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Find the particular solution to the given differential equation that satisfies the given conditions.2
+ 11
+ 12y = 0; Dy = 0 and y = 1 when x = 0
A. y = - 
e-4x + 
e-3x/2
B. y = 
e-4x - 
e-3x/2
C. y = 
e-4x - 
e-3x/2
D. y = - 
e4x + 
e3x/2
Use De Moivre's theorem to evaluate the expression. Write the result in standard form.(2(cos 90° + i sin 90°))3
A. -8i B. -8 C. 0 D. -6i
Consider the feasible set, FS, shown below. Find the coordinates of vertex A.
A. 
B. (2, 2)
C. 
D. 
E. none of these
Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
Objective Function: z = x + 6y + 5Find minimum.
A. minimum: 27 B. minimum: 37 C. minimum: 21 D. no minimum