Tanner, J. H. (John Henry), b. 1861, Allen, Joseph · New York, American Book Co · leaf 201
e = 1; the standard equation y = ipx; the focus is the point F= (jp, 0); the directrix is tlie line a;= — jj; the axis of the curve is 2/ = 0; the equation of the tangent at (a;,, y^), y,.?/ = 2p(x + a^) ; or, in terms of its slope, y = mx + i-; m the equation of the diameter y = —^, m where m is… … Fig. 77. a curve: (1) by plotting points to be connected by a smoothcurve, and (2) by the motion of a point constrained by some mechanical device to satisfyp^^^ the law which defines tlie curve. These two methodsmay be used in construct-ing a parabola. (1) By separate points.Given the focus F and…
Geometry, Analytic
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