A Treatise On the Differential And Integral Calculus
The book A Treatise On the Differential And Integral Calculus was written by author Theodore Strong Here you can read free online of A Treatise On the Differential And Integral Calculus book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Treatise On the Differential And Integral Calculus a good or bad book?
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EXAMPLES. 165 Taking tlie differentials, we have — = dx loff a or -f- ^p =zy loo; a, y ^ dx ^ -^ "=" ■ and £ =y := J log 6j^ = ^ log a. Hence, representing log a by —, we shall have llh ^^l = t^^^^yl±. F. And y = i^, ; consequently, from r = ^^ — y ? ^^ shall have uc" ' 7/r 7ny ' for the radius of curvature : noticing, that the center of the circle must (see fig. P. 142) be taken on the concave side of the curve. 2. To find the radius of curvature at any point of the common cycloid. From p. 150... we have ~ = p = y, r and f=y- "^ - -'• dx -^ Hence we shall have i?^ + l = ?^ and {p^-i-lf=^]/^S. X -^ ' X X . 1 consequently, (^ + 1)'^ -^ ji?' = 2 \^r x (2r — a?) r= the ra- dius of curvature. Thus it is manifest that the radius of curvature equals twice the corresponding normal of the cycloid ; so that (see the fig. At p. 149) the radius of curva- 166 EADII OF CURVATURE, ETC. Ture at G equals twice the chord BF of the arc of the gener- ating circle, which corresponds to the cjcloidal arc GO.
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