Drawing conic tangents on ellipse

Circle - tangent pin.jsx

poz = content("Group 1").transform.position; // Cicrle Position
centre= [0,0]; // PIVOT POINT
cx = poz[0];
cy = poz[1];
diametre = content("Group 1").content("Ellipse Path 1").size;
r = diametre[1] / 2;
P = length( centre , [Math.abs(cx), Math.abs(cy)]);

// ZEROED //
if ( P < r)  {
	draw = [centre,centre];
} else {

// TRIGO //
hyp = P;
adj = r;
opp = Math.sqrt(P * P - r * r);
Cos = adj / hyp; 
Sin = opp / hyp;

// PATH //
p = [];
a = [-Cos, Sin] * r + poz;
b = [-Cos, -Sin] * r + poz;

function rotate(x, y) {
	A = -(Math.atan2(cy, cx)); // radian
	cos = Math.cos(A),
	sin = Math.sin(A),
	nx = (cos * (x - cx)) + (sin * (y - cy)) + cx;
	ny = (cos * (y - cy)) - (sin * (x - cx)) + cy;
	return [nx, ny];
}
a = rotate(a[0], a[1]);
b = rotate(b[0], b[1]);
draw = [centre, a, b];
}
createPath(draw);