Graph the equation by plotting points. Use values of ? that are multiples of 30°.r = -6 sin ?
A. 
B. 
C. 
D. 
Answer: D
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Identify the quadric surface by name. Find and describe the xy-, xz-, and yz-traces, when they exist.-9x2 - 9y2 + z2 = 9
A. Hyperboloid of two sheets; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola) B. Ellipsoid; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (ellipse); yz-trace: z2 - 9y2 = 9 (ellipse) C. Hyperboloid of two sheets; xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola) D. Hyperboloid of one sheet; xy-trace: -9x2 - 9y2 = 9 (circle); xz-trace: z2 - 9x2 = 9 (hyperbola); yz-trace: z2 - 9y2 = 9 (hyperbola)
Graph the pair of parametric equations with the aid of a graphing calculator.x = t - sin t, y = 1 - cos t, -4? ? t ? 4? 
A. 
B. 
C. 
D. 
Find the volume of the solid generated by revolving the region about the given axis. Use the shell or washer method.The region bounded by y = 6
, y = 6, and x = 0 about the y-axis
A. 
?
B. 4?
C. 2?
D. 
?
Graph the function.y = -cot x
A. 
B. 
C. 
D. 