Focal chord property (parametric parabola) (For y²=4ax, endpoints (at₁²,2at₁) and (at₂²,2at₂) on a focal chord ⇒)
jee-mainjee-advanced
For y²=4ax, endpoints (at₁²,2at₁) and (at₂²,2at₂) on a focal chord ⇒ t₁t₂=−1
What each symbol means
| Symbol | What it stands for |
|---|---|
| t_1,t_2 | Parameters of endpoints |
When to use this
Standard parabola; focal chord through focus (a,0).