Dowling, L. Wayland (Linnaeus Wayland), b. 1867, Turneaure, F. E. (Frederick Eugene), 1866- · New York, H. Holt and company · leaf 30
ositive direction ofa fixed linear scale OX, calledthe initial line or axis (Fig. 8).OP is called the radius vector,and the angle XOP the vec-torial angle, or simply theangle, r and 6 are the polarcoordinates of P. The nota-tion P = (r, 9), or P(r, 6), means that r and 6 are the polar coordi-nates… … Fig. 8 14 SYSTEMS OF COORDINATES [Chap. I. through the given angle $ about 0 into the position OX. OnOX mark the point which represents the given number r. Thereis but one such point. Por example, the point P(-~ 5, — 30°) isobtained by rotating OX through the angle — 30° and markingthe point 5…
Geometry, Analytic
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