Tanner, J. H. (John Henry), b. 1861, Allen, Joseph · New York, American Book Co · leaf 247
whose radius vector isparallel to the line. 138. Distance and direction from one point to another. Let OX, OY, OZ be a set of rec-tangular axes, and P^ = (xj, j/i, z^and Pj = (x^ !/2, Zj) be two givenpoints. Then the planes throughPi and Pj parallel, respectively,to the coordinate planes, form… … FiQ. 93. 137-139] COORDINATE SYSTEMS. THE POINT That is, if d be the required distance, 231 d =y/{x.i - a^i)* + (j/2- 2/1)* +(82- «i)2- [65] Moreover, since the direction of the line PjP^ is given bythe angles a, /8, y, which it makes, respectively, with the linesPiX, P\Y, and P^Z, drawn through Pj…
Geometry, Analytic
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