Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 247
he planeHK, when the equation of ffKis given in the form X cos « + y COS l3 -{- z cos y — p = 0, Pass a plane BS through P^, parallel to HK. Itsequation will be X cos a + ^ cos ^ -\- z cos 7 — j9j = 0, 230 ANALYTIC GEOMETRY OF SPACE [Ch. Ill, § 18 where p^ am be either positive or negative, since… … Fig. 12. lie, MF^ = iVTVi = OiVi - 0]V=pi -p= x-^ cos a + y-^ cos P -\- z-^ cos 7If the equation is given in the form Ax + By -\- Cz -f- i> = 0,jUj* _ Aqci + By I + Czi + J> [17] where the sign of the radical is chosen opposite to that ofD. The distance MP^ is positive when the point andthe…
Geometry, Analytic
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