Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 122
foundto be, XX, -^yy, + Gix + x,) + F (?/ + 2/,) + C = 0. The polar of (x^^ y^) is the same equation, and the previousremarks hold true here. 75. Geometrical construction of the polar and pole. — Let P be the given point whose polar is required. Take center 0as origin, and OP as a?-axis. Then the… … Fig. 88. construct it, find B so that OP x OB = OA^, i.e., a thirdproportional to OP and OA (r). Then MN _L to OP at B isthe polar required. To find the pole of a given line MN, draw OB ± to it, anddetermine P so that OB x OP = OA = r\ EXERCISES. 1. Find the polars of (1, 4), (- 2, - 5), (3, - 1),…
Geometry, Analytic
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