Number of points on the ellipse x^2/50+y^2/20=1 from which pair of perpendicular tangents are drawn to the elllipse x^2/16+y^2/9=1 is ?
Number of points on the ellipse x^2/50+y^2/20=1 from which pair of perpendicular tangents are drawn to the elllipse x^2/16+y^2/9=1 is ?