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Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 93
-perbola whose less focal distance is i, greater focal distance 2, semi-parameter A, eccen-tricity f Example. — Plot /-^ = 8 cos (2 9).0 = 0° 22.^° 45° 135° 157i° 180° … r = ± 2.828 ± 2.378 0 imaginary 0 ± 2.37 ± 2.828Geometry, Analytic
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