Solve the problem.What is the domain of the cosine function?
A. all real numbers
B. all real numbers, except integral multiples of ? (180°)
C. all real numbers from -1 to 1, inclusive
D. all real numbers, except odd multiples of 
(90°)
Answer: A
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Simplify where possible. Then solve the equation.9 - 5 = 2r
A. r = 
B. r = 0
C. r = 2
D. r = 
Find the phase shift.y = 3 cos
A. 
units to the left
B. 
units to the right
C. 
units to the right
D. 
units to the left
The feasible set (FS) for a certain linear programming problem is shown below. Determine the values for x and y that maximize 3x + 4y. What is the maximum value?
What will be an ideal response?
Find the vertex of the parabola, and determine whether the parabola opens upward, downward, to the left, or to the right.x = -(y + 2)2 + 6
A. (4, -6), right B. (-2, 6), left C. (6, -2), left D. (6, -2), right