Analytic geometry and principles of algebra (1913)
Ziwet, Alexander, 1853-1928, Hopkins, Louis Allen, joint author, Hedrick, E. R. (Earle Raymond), 1876-1943 · New York, The Macmillan Company · leaf 219
any radius meets the circles at P^. P.,, the intersection P ofthe parallels through P^, P^ to the diameters is a point of theellipse. 213. Tangent to Ellipse. It follows from § 211 that ifP {x, y) is any point of the ellipse and Pj that point of the cir-cumscribed circle which has the same… … For, as the circle is turned about A.A^ into the position inwhich P is the projection of P^, the tangent to the circle at P^is turned into the position whose projection is PT, the point Ton the axis remaining fixed. X, § 214] ELLIPSE AXD HYPERBOLA 207 The tangent .rjX + ^Vi Y— « to the circle at P^…
Geometry, Analytic
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