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When we talk about ``the point with coordinates (x,y)'' or ``the curve with equation f(x,y)'', we will always have in mind cartesian coordinates (Section 1.2). If a formula involves another type of coordinates, this will be stated explicitly.
Wed Oct 4 16:41:25 PDT 1995
This document is excerpted from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (CRC Press). Unauthorized duplication is forbidden.