Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 62
OL — p = 0. 8. ^—h t- = 1. 9. Find the length of the perpendicular from the point X II {a, I) on the line — -j- ^ = 1, and show that it is equal tothe negative distance of the line from the origin. 46 PLANE ANALYTIC GEOMETRY. 10. Find tlie points on tlie axis of X which are at a per-pendicular… … Let P be any point of theline, and X = ON, the abscissa of P; y = NP, its ordinate; a = angle NOMoi the per-pendicular with the axis of X\ P= OM. From N draw NQ parallel to the line, and PR parallel toOM. Then OQ = OiV^cos a = X cos a;QM = NP sin a = y sin a; Hence OQ -\- QM = p — X cos a -\- y sin…
Geometry, Analytic
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