Dowling, L. Wayland (Linnaeus Wayland), b. 1867, Turneaure, F. E. (Frederick Eugene), 1866- · New York, H. Holt and company · leaf 146
wn from the point tothe conic. A point isinside a conic when notangents can be drawnfrom it to the conic. Theorem I. If thejjoint (x-^, 2/i) is outsidea conic, its polar linewith respect to theconic passes through thepoints of contcLct of thetangents draivn fromthe point. Let the conic be… … ^ + m = l and^ + # = l. a^ Since the tangents pass through A, the coordinates of A satisfyeach of the above equations. Hence, ^2 I .M? ce ¥ 1 and ^j^3 ^ M? = 1.a 62 But these same equations result from substituting the coordinatesof the points B and C in the equation of the polar line of A…
Geometry, Analytic
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