We examine the locus of the intersection of the perpendicular from the focus to the tangent with the horizontal from the point of contact and find it to be a cubic, closely related to the Tchirnhausen cubic.
Expressions
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We examine the locus of the intersection of the perpendicular from the focus to the tangent with the horizontal from the point of contact and find it to be a cubic, closely related to the Tchirnhausen cubic. Expressions
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