Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 132
Fig. 104. On problems 17, 18, 19 is based a simple method of drawing tangentsto the conic sections through a given point. With the given point ascenter and radius equal to distance from given point to one focus strike * Since it is true of rays of light, heat, and sound that the reflected rayand…
Geometry, Analytic
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