## An Elementary Treatise on Trilinear Co-ordinates: The Method of Reciprocal Polars, and the Theory of Projections |

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An Elementary Treatise on Trilinear Co-Ordinates, the Method of Reciprocal ... Norman MacLeod Ferrers No preview available - 2015 |

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angular points appears asymptotes becomes called centre Chap chapter chord circle co-ordinates coefficients coincide condition conic conic section considered constant corresponding curve denoted described determinant directrix distance equal equation EXAMPLES expressed find the equation fixed point foci focus follows four points given point given straight line gives Hence identical imaginary inter line at infinity line joining locus lying meet move observed obtain opposite sides pair parabola parallel passing perpendicular point f points of contact points of intersection polar pole positive produced projection proposition prove range reciprocal relation represented respect result right angle satisfy second degree seen sides similar Similarly Suppose tangents tangents drawn term theorem third three points tion touch triangle of reference values whence writing written