Write the function in the form 
or 
. Find the period and phase shift.y = -3 cos
A. y = -3 cos
period = 5; phase shift = 
B. y = -3 cos
period = 
; phase shift = - 
C. y = -3 cos
period = 
; phase shift = - 
D. y = -3 cos
period = 5; phase shift = 
Answer: B
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Which of the following is true? ?
A. ?The surface area of a sphere is 8 times the area of a circular cross-section, taken at the center of the sphere. B. ?The surface area of a sphere is twice the area of a circular cross-section, taken at the center of the sphere. C. ?The surface area of a sphere is four times the area of a circular cross-section of the sphere. D. ?The surface area of a sphere is four times the area of a circular cross-section of the sphere, taken at the center of the sphere. E. ?The surface area of a sphere is 8 times the area of a circular cross-section of the sphere.
Find all cube roots of the complex number. Leave answers in trigonometric form.4 - 4i
A. 
cis 100°, 
cis 220°, 
cis 340°
B. 
cis 60°, 
cis 180°, 
cis 300°
C. 
cis 80°, 
cis 200°, 
cis 320°
D. 
cis 100°, 
cis 220°, 
cis 340°
Find the domain of the expression.
?
?
A. All real numbers x such that x ? 8 B. All real numbers x such that x ? 2 C. All real numbers x such that x> 2 D. All real numbers x E. All real numbers x such that x> 8
Evaluate the expression.
2
A. 
B. 
C. 
D. 2