Length of Tangent.


@anujpatil
divide by 2 ,
and lenght of tangent is$\sqrt{S_1}$

What is S1?

@anujpatil for any curve
$ax^2+2hxy+by^2+2gx+2fy+c=0$ $S_1$ for point$(x_1,y_1)$ is defined as
$S_1=a{x_1}^2+2hx_1y_1+b{y_1}^2+2gx_1+2fy_1+c$ Note: for circle, u make coef of
$x^2$ and$y^2$ as 1 and then find$\sqrt{S_1}$

@HarshalPatil so S1 is the lenght on tangent?

@anujpatil for any external point
$(x_1,y_1)$ $\sqrt{S_1}$ gives length of tangent.

@HarshalPatil @ashishdeosingh OK! Thanks explaining in deep.