Elements of analytical geometry and of the differential and integral calculus (1866)
Davies, Charles, 1798-1876 · New York, Barnes & Co. · leaf 76
y 6 = 0, the equation will become, r = — 2R cosw. In this equation the ra-dius-vector will be negative,when cos v is positive, andpositive, when the cost; isnegative. Hence, the radius-vectorwill not give points of thecurve from v = 0, to v = 90°. It will give points of thecurve from v = 90°, to v… … r cos Vy y = r sm 0. BOOK III. D p
Geometry, Analytic · Calculus
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