Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 147
osition we shall have PF -\- PF = the constant length of the thread. The line AA^ drawn through the foci and terminated bythe curve is called the transverse or major axis, and BBbisecting AA at right angles is called the conjugate orminor axis. The two are called principal axes. The semi-axes CA… … 132 PLANE ANALYTIC GEOMETRY. 117. Problem. To find the equation of the ellipse. Solution. Let C, the intersection of. AA^ and BB^, bethe origin; CA the axis of X, and GB the axis of Y; putCA = CA = a, CF — OF = c, and x, y the co-ordinatesof any point P on the locus. Then we shall have PF 1= VPM +…
Geometry, Analytic
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