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Solved: Ellipses An ellipse (discussed in detail in
Chapter 8, Problem 58E(choose chapter or problem)
Ellipses An ellipse (discussed in detail in Section 10.4) is generated by the parametric equations x = a cos t, y = b sin t. If 0 < a < b, then the long axis (or major axis) lies on the y-axis and the short axis (or minor axis) lies on the x-axis. If 0 < b < a, the axes are reversed. The lengths of the axes in the x- and y-directions are 2a and 2b, respectively. Sketch the graph of the following ellipses. Specify an interval in t over which the entire curve is generated.
x = 12 sin 2t, y = 3 cos 2t
Questions & Answers
QUESTION:
Ellipses An ellipse (discussed in detail in Section 10.4) is generated by the parametric equations x = a cos t, y = b sin t. If 0 < a < b, then the long axis (or major axis) lies on the y-axis and the short axis (or minor axis) lies on the x-axis. If 0 < b < a, the axes are reversed. The lengths of the axes in the x- and y-directions are 2a and 2b, respectively. Sketch the graph of the following ellipses. Specify an interval in t over which the entire curve is generated.
x = 12 sin 2t, y = 3 cos 2t
ANSWER:Solution 58E
Step 1:
An ellipse is generated by the parametric equations ,. If 0<a<b, then the long axis (or major axis) lies on the y-axis and the short axis (or minor axis) lies on the x-axis. If 0<b<a, the axes are reversed. The lengths of the axes in the x- and y-directions are 2a and 2b, respectively.