Ellipse: directrices (Directrices are vertical lines x = ±a/e for horizontal major axis)
jee-mainjee-advanced
Directrices are vertical lines x = ±a/e for horizontal major axis
What each symbol means
| Symbol | What it stands for |
|---|---|
| a | Semi-major |
| e | Eccentricity |
When to use this
Standard centered ellipse, major on x.