Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 46
. 31 61 = 0°, r = 0; 6= 15°, r= .52a; 61 = 30°, r = a; ^ = 45°, r = 1.41a61 = 60°, r= 1.73a; 61 =75°, r= 1.93a; 61 = 90°, r = 2a; 6i = 105°, r = 1.93a61 = 120°, r = 1.73a; 6*= 135°, r= 1.41a; tf = 150°, r=a; 6i = 165°r = .52a; ^ = 180°, r = 0; 6* = 195°, r=—.52a; ^=210°, r=—a6* = 225°, r= —1.41a;… … For angles in the third and the fourth quadrants r is negative, and is,therefore, measured along the backward extension of the terminal line.For example, if ^=195°, r= —.52a. We measure .52a units awayfrom the 195° point and toward the 15° point. We obtain, therefore,the same point of the curve for…
Geometry, Analytic
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