From conic intersections to toric intersections: The case of the isoptic curves of an ellipse
From conic intersections to toric intersections: The case of the isoptic curves of an ellipse
Starting from the study of the orthoptic curves of parabolas and ellipses, we generalize to the case of isoptic curves for any angle, i.e. the geometric locus of points from which a parabola or an ellipse are viewed under a given angle. This leads to the investigation of spiric curves …