Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 134
entarychord is parallel to the tangent dratvn at the extremity of thatdiameter. 85. The principles of Arts. 83, 84 afford us two differentmethods of constructing a tangent to the ellipse at a givenpoint. First Method. — Art. 83, Schol. Let V, Fig. 40, be the givenpoint. Through P draw the ordinate… … Fig. 40. Second Method. — Art. 84 and Cor. Draw PR througli thecentre, and from A draw AE || to PR; PT drawn throughV II to RA will be tangent to the ellipse at P. 86. To deduce the equation of the normal to the ellipse.The equation of any line through V (x, y), Pig. 39, is ^J - y = s (a; - x) . .…
Geometry, Analytic
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