If the eccentric angles of the extremeties of a focal chord (other than the major axis) of the ellipse…
If the eccentric angles of the extremeties of a focal chord (other than the major axis) of the ellipse $\frac{x^2}{25}+\frac{y^2}{9}=1$ are $\alpha$ and $\beta$ then $\frac{\cot \left(\frac{\alpha}{2}\right)}{\tan \left(\frac{\beta}{2}\right)}=$