Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 238
sition of a space point is completely determinedwhen we know its distance and direction from some fixed point.For a complete expression of the direction of the point it isnecessary that two angles should be given. The anglesusually taken are 1st, The angle which the line joining the point and… … Fig. 77. Let O be the fixed point and P the point whose position wewish to determine. Join 0 and P, and let XOY be any planepassing through 0. Leb OX be a given line of the planeXOY. Draw PB 1 to XOY and pass the plane PBO throughPB and OP. The intersection OB of this plane with XOYwill be the…
Geometry, Analytic
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