Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 247
ch also equals Va- -|- b. Hence the following rule : From the centre of the hijperhohi describe a circle with aradius equal to the semi-diagonal of the rectangle on the axes.The circle will cut tlie transverse axis in the foci of the prlnnrri/ 232 PLANE ANALYTIC GEOMETRY. hyperbola, and the… … Let C be the centre of the hyperbola, F and F the foci, andDM and DM the directrices. Take Pi a point on the right-hand branch and draw the ordinate NPi, the focal radii FPiand FPi, and the line P^MM perpendicular to the directrices.Then by defijiition of the hyperbolaFPi=re. MPi, , = e.(CN- CD), =…
Geometry, Analytic
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