An elementary treatise on coordinate geometry of three dimensions (1912)
Bell, Robert J. T. (Robert John Tainsh), 1877-1963 · London : Macmillan and co., limited · leaf 38
a, 0, 0), (- a, 0, 0) is constant, (2k), is the ellipsoid X V ~f~ zuof revolution -rs+ja 2 = 1- SSii-WJ CHAPTER II.PKOJEcnoNa 12. The angle that a given directed line OP makes witha second directed line OX we shall take to be the smallestangle generated by a variable radius turning in the planeXOP… … Fio. 0. Fio. 10. 13. Projection of a segment. If ab is a given segrru ntand A, B are the feet of the perpendiculars from A, B to agiven line Xx, the segment ab is the projection of flicsegment AB on xx. From the definition it follows that the projection of BAis BA, and therefore that the…
Geometry, Analytic
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