A general geometry and calculus : including book I. of the general geometry, treating of loci in a plane; and an elementary course in the differential and integral calculus (1881)
Olney, Edward, 1827-1887 · New York : Sheldon and Co. · leaf 226
is. [Let the student give the proof and afigure to illustrate it.] 32S, Coe. 5.—This pj^oposition and Coe. 1st may also be asserted ofordinates to any diameter of an ellipse oran hyperbola. Dem.—The corollary can be proved in thesame way as the proposition, by using theequation of the curves… … Fig. 215. 326. Coe. Q^.—Fromthe last relation, it fol-lows that chords paral-lel to any diameter arebisected by its conjugate,i e.PD = DH,PD= DH, etc. ; andhence that these curvesare symmetrical with re-spect to any diameter. 327* ScH.—These principles, togetherwith others already known, enable us…
Geometry, Analytic · Calculus
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