Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 346
Fig. 22. surface we wish to study. Accordingly, we will use thisequation in the work that follows, writing our formulas asgeneral formulas in which the student must make the ap-propriate substitutions for a^, b^, c^, and k in any particularproblem. … Fig. 23. 332 SOLID ANALYTIC GEOMETKY. 33. Tangent Plane. The locus of the taiujent lines drawn to the surface at anypoint is a plane called the tangent plane, the point being calledthe point of tangency or the point of contact. Let Pi (xi, yi, Zi) be any point of the surface x^ v^ z^ a b- c ^ Then,…
Geometry, Analytic
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