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Inside this Book – If P and Q are points on two confocals such that the tangent planes at P and Q are at right angles, the plane through the centre and the line of intersection of the tangent planes bisects PQ. Hence shew that if a conicoid touches each of three given confocals at two points it has a fixed director sphere.
Inside this book –An Elementary Treatise on Coordinate Geometry PDF Book by Robert J.T. Bell -Therefore any point on the focal hj r perbola is a focus of the first species, and the ellipsoid is the locus of a point the square on whose distance from a focus of the first species is proportional to the rectangle under its distances from the two planes through the corresponding directrix parallel to the real circular sections.
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An Elementary Treatise on Coordinate Geometry by Robert J.T. Bell PDF : eBook Information
- Full Book Name – An Elementary Treatise on Coordinate Geometry
- Author of this Book – Robert J.T. Bell
- Language – English
- Book Genre – Geometry, Mathematics, Elementary, Science
- Download Format – PDF
- Size – 13.8 MB
- eBook Pages –398
- Price – Free
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