Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 120
i<^i.yi) … ^xixi,yx) j(a!2,1/2) Fig. 87. 104 ANALYTICAL GEOMETRY 73. Theorem. If the polars of P^ and P^ intersect in P,then P is the pole of the line P^ Pg. Proof: The polar of P^ passes through P, .. the polar of P passes through P^. [§72.] Similarly, the polar of P passes through P2. .-. PjPg is the polar…
Geometry, Analytic
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