Plane and solid analytic geometry; an elementary textbook (1904)
Ashton, Charles Hamilton, 1866-1936 · New York, C. Scribner's Sons · leaf 80
is represented by 6. The usual convention in regardto angles will be followed, — the anti-clockwise direction of rotation being con- ,p sidered positive. These two quantities are called the polar coordinates of the point, and are written (/o, 0). The line OA is called the initial line, and the… … 64 ANALYTIC GEOMETRY [Ch. V, § 42 will be an indefinite number of angles which have thesame terminal line. If 6 is restricted to\values between— 2 7r and 2 7r, any point may be determined by four setsof coordinates. If the polar coordinates of the point P in Fig. 40are (/?, 0), the same point may…
Geometry, Analytic
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