Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 200
point of (3), as was tobe proved. If S is the point of intersection of (5) and (2), we find S tobe the point (— p, yi). Therefore, S is at the same distancefrom OX as is P^, and hence is on the line through Pj parallelto OX. THE PARABOLA. 185 It is readily showu that tlie distances RS and RF are… … Fig. 83. Let Pj be the point from which the tangents are to bedrawn, and let F be the focus of the parabola. With P^ as acentre and a radius equal to PiF describe a circle, denotingby $2 and S3 the points at which it meets the directrix.From $2 and S3 draw lines parallel to OX, which will…
Geometry, Analytic
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