Smart, Edward Howard · London : Macmillian and Co. · leaf 247
. Lettering the angular points,this gives BP.CPAQ.DQBP.CP~AQ.DQ Hence gP^^ BK^a,CP.AQ CP.AQ BP.DQCP.AQ is constant. PROPERTIES OF THE CONIC 219 ^ sinABP _ a/BP _ asinCBP~/3/BP~/3 Similarly sinCDP_7sinADPS — is constant. But 7STs= and -jr^^ = -.CP 7 AQ a ^ is constant./35 … Fig. 1116. § 5. The dual method of presentation of theorems will beadopted for the rest of this chapter. The student is recom-mended, however, to study the proofs of each of a pair oftheorems independently before proceeding to compare thempoint by point. (a) Prop. The locus of theintersections of…
Geometry, Projective
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