20. If the chord through the points whose eccentric angles are A and B on the ellipse x²/a² + y²/b² = 1 passes through the negative focus then the value of Tan(A/2).Tan(B/2) is

20. If the chord through the points whose eccentric angles are A and B

1.	20. If the chord through the points whose eccentric angles are A and B on the ellipse x²/a² + y²/b² = 1 passes through the negative focus then the value of Tan(A/2).Tan(B/2) is
Answer» 20. If the chord through the points whose eccentric angles are A and B on the ellipse x²/a² + y²/b² = 1 passes through the negative focus then the value of Tan(A/2).Tan(B/2) is