A general geometry and calculus : including book I. of the general geometry, treating of loci in a plane; and an elementary course in the differential and integral calculus (1881)
Olney, Edward, 1827-1887 · New York : Sheldon and Co. · leaf 138
e subtangents. 151. Def.—Tlie Suhtangent to a ^olar Curve is the 108 PROPERTIES OF PLAKE LOCI. distance from the pole to the , tangent, measured on aperpendicular to the radius vector to the point oftangency. Thus in the figure let M N be a curvereferred to P as its pole, S any point in the… … m which r is the radius vector and 0 the variable angle. Fig. 110. Pem. In tlie last figure let R be a point on the curve consecutive with S (infi-nitely near it), so that the tangent RT is to be considered as coinciding with thecurve between R and S. Draw PR, and with radius vector PS as a…
Geometry, Analytic · Calculus
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