Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 163
Fig. 79. 146 ANALYTIC GEOMETRY [Ch. XI, § 80 coincident with the minor axis and also revolve in thepositive direction, since we have seen that the two mustpass tluougli different quadrants. Let the student show that the angle P^CP^. in whichthe minor axis lies, will always be obtuse. If, in the… … conjugate diameter, P^K^, will start coincident Avith theminor axis and revolve in tlie negative direction. Forthe tivo diameters must remain in the same quadrant. Since 72 7 the i^roduct of the two slopes is —, if L is less than -, Z,^ a^ a ^ must be greater than -, and tlie ttvo diameters must…
Geometry, Analytic
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