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- (%i1) a : c / (1 - e^2);
- c
- (%o1) ------
- 2
- 1 - e
- (%i2) b : c / sqrt(1 - e^2);
- c
- (%o2) ------------
- 2
- sqrt(1 - e )
- (%i3) d : a * e;
- c e
- (%o3) ------
- 2
- 1 - e
- (%i4) r : c / (1 + e * cos(t));
- c
- (%o4) ------------
- e cos(t) + 1
- (%i5) x : d + r * cos(t);
- c cos(t) c e
- (%o5) ------------ + ------
- e cos(t) + 1 2
- 1 - e
- (%i6) y : r * sin(t);
- c sin(t)
- (%o6) ------------
- e cos(t) + 1
- (%i7) trigsimp(x^2/a^2 + y^2/b^2);
- (%o7) 1
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