Dowling, L. Wayland (Linnaeus Wayland), b. 1867, Turneaure, F. E. (Frederick Eugene), 1866- · New York, H. Holt and company · leaf 85
= FM = a2. Hence, using MA and MA^ as radii and F and F-^ as centers, arcsof circles can be drawn intersecting in points of the locus. Thus, 68 LOCI AND THEIR EQUATIONS [Chap. IV. the points K, L, S, and T are on tlie locus. Repeating theprocess with other secants, as many points of the locus can… … Fig. 40 To find the equation of the locus, let FF^ be the X-axis and theperpeiidicular bisector of FF^, the Y-axis. Let the distance be-tween the foci be represented by 2 c, and let r and i\ representthe focal radii, PF and PF^, respectively. Then, as in Art. 49, r^ = c- + 2 ex -f x^ 4- y^,7-j2 =…
Geometry, Analytic
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