Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 105
ctsthe X-axis. But the sub-tangent CT is the distance of thispoint from the foot of the ordinate of the point of tangency;i.e., twice the distance just found; hence Sub-tangent = 2 x \, 90 PLANE ANALYTIC GEOMETRY. i.e., the sub-tangent is equal to double the abscissa of the pointof tangency. 59.… … Fig. 31. A line joining T and P will be tangent to the parabolaat P. 60. To deduce the equation of the normal to the parabola.The equation of any line through P (x, y) Fig. 31, is y-y = s(x- x) ... (1)We have found Art. 57, (5) for the slope of the tangent PT hence, for the slope of the normal…
Geometry, Analytic
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.
