Find the square roots of the following number.
A. 
, - 
B. 
, - 
C. 
, - 
D. 
, - 
Answer: C
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Find a rectangular equation for the plane curve defined by the parametric equations.x = 8 sin t, y = 8 cos t; 0 ? t ? 2?
A. y2 - x2 = 64; for x in -? < x < ?
B. y = x2 - 9; for x in -2 ? x ? 2
C. y = 
= 64; for x in -? < x < ?
D. x2 + y2 = 64; for x in -8 ? x ? 8
Find the domain of the rational expression.
A. 
B. All real numbers
C. 
D. 
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = 
, csc ? > 0Find sin 
.
A. 
B. 
C. 
D. 
Solve the problem.The radius of a right circular cone is given by the formula 
, where V is the volume and h is the height. If the volume is 2281 cubic inches and the height is 13 inches, what is the radius? Use 3.14 for ?, and round your answer to the nearest tenth of an inch.
A. 0.1 inches B. 7.5 inches C. 12.9 inches D. 13.6 inches