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 268
ian coordinates and determine the character of the origin. 268. Cissoid. 00 = a being a diameter of a circle, let anyradius vector drawn from 0 meet the circle and its tangent at 0at the poi)its Q, D, respectively; if on this radius vector we layoff OR = QD, the locus of 2i is called the cissoid of… … a — X Fig. 109 If instead of taking the difference of the radii vectores of thecircle and its tangent, we take their sum we obtain the so-calledcompanion of the cissoid, r = a(cos <f> 4- sec <^), I.e. Sketch this curve. y 2 X- ,Ja X — a 269. Versiera. With the data of § 268, let us draiv…
Geometry, Analytic
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