When you have finished your sketch, use a computer to draw
Chapter 13, Problem 13.47(choose chapter or problem)
When you have finished your sketch, use a computer to draw the curve with viewpoint directly above and compare with your sketch. Then use the computer to draw the curve from several other viewpoints. You can get a better impression of the curve if you plot a tube with radius 0.2 around the curve. (Use the tubeplot command in Maple.)
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