Plane and solid analytic geometry; an elementary textbook (1901)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's sons · leaf 141
nd in this way and the parabola passed through them. 72. Auxiliary circles. — The auxiliary circle of a cen-tral conic is a circle described on the major axis asdiameter. Its equation is x2 + y2 = a2. The circle described on the minor axis as diameteris called the minor auxiliary circle. Its… … Fig. 68. Fig. 68, Px and R are corresponding points. The angleMXCR is called the eccentric angle of the point Pv There is a simple relation between the ordinates of thecorresponding points P1 and R which may be found inthe following manner. Let the coordinates of Px be(xv yx), and of R (xv y2).…
Geometry, Analytic
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