Epispiral
The epispiral is a plane curve with polar equation
- .
An epispiral with equation r(θ)=2sec(2θ)
There are n sections if n is odd and 2n if n is even.
It is the polar or circle inversion of the rose curve.
In astronomy the epispiral is related to the equations that explain planets' orbits.
See also
References
- J. Dennis Lawrence (1972). A catalog of special plane curves. Dover Publications. p. 192. ISBN 0-486-60288-5.
- https://www.mathcurve.com/courbes2d.gb/epi/epi.shtml
| Curves |  | ||
|---|---|---|---|
| Helices |
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| Spirals | |||
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