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Elements of analytical geometry and of the differential and integral calculus (1866)
Davies, Charles, 1798-1876 · New York, Barnes & Co. · leaf 190
s of the plane. Thesetraces are found by combining the equation of the plan©with the equations of the co-ordinate planes.Thus, if in the equation, z •\- ax + hy — c = 0, we make y = 0, which isthe characteristic of the co-ordinate plane ZJT^ the re-sulting equation, s + aic — c = 0, ij/ will… … = c AD. and = AO, and the trace may then be drawn through the points Cand D, 1. We likewise find, for the trace j57>, z = ~- by + c; a cand for the trace BC, y=—^-aj-l-r-* 0 0 We also find AD = c, by making y = 0, in the 190 ANALYTICAL GEOMETRY. [bOOK VI.Geometry, Analytic · Calculus
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