Mathematics for engineering students, Analytical geometry and calculus (1907)
Keller, S. S. (Samuel Smith), 1867-1923, Knox, W. F., [from old catalog] joint author · New York : D. Van Nostrand company · leaf 33
a = —- = - ■ SN x * The conventions as to positive and negative direction for lines,and positive and negative revolution for angles, is maintained inAnalytical Geometry, as indeed is necessary in order to accomplishconsistent results. 24 Analytical Geometry. Let tan a be represented by m; then m =… … Fig. 12. is the equation of AB. Had the line crossed the first quad-rant the construction would have been as in Fig. 12 andwe would have NPtanPSN= —> SN or tan (180 — a) =— tan a = — m = xb — y xb — y x y = mx + b as before. Analytical Geometry. 25 m is called the slope of the line and b its…
Geometry, Analytic · Calculus
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