Dowling, L. Wayland (Linnaeus Wayland), b. 1867, Turneaure, F. E. (Frederick Eugene), 1866- · New York, H. Holt and company · leaf 220
origin draw two segments, OPand OQ, having lengths and direc-tion angles equal respectively to thelengths and direction angles of thegiven segments (Fig. 123). By defi-nition, 6 = POQ is the angle to befound. Let the coordinates of P beX = OD, y = DE, and z = EP. Now, by the preceding article, the… … Fig. 123 have cos e = cos aj COS a.2 -|- COS Pj COS P2 + COS 7i cos 73. We will assume that the angle between the given segments is thesmallest positive angle satisfying this equation ; that is 0 < ^ < TT. 151. Perpendicular segments. Parallel segments. (a) Tivo segments are perpendicular to…
Geometry, Analytic
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.
