An Introduction to the Infinitesimal Calculus Notes for the Use of Science And
The book An Introduction to the Infinitesimal Calculus Notes for the Use of Science And was written by author H S Horatio Scott Carslaw Here you can read free online of An Introduction to the Infinitesimal Calculus Notes for the Use of Science And book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is An Introduction to the Infinitesimal Calculus Notes for the Use of Science And a good or bad book?
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(l-e2) (l-e2)2', 2 y2 Putting a2 = and ^>2 = (1 - e2)2 (1 _ e2) ri2e2 (1 - ^2)2 d^ 1 - «2' /Tr'2 . 1*2 we have l + f^'^-^' where ^2 = 0^2^1 _g2^. In this form the origin C is called the centre of the curve, since it bisects every chord which passes through it. This is a;2 y2 clear, since if {x^, y^) lies on -2 + T2= 1> so does {-x^, -Vi)- d de^ Also we notice that CS = . ; 5 -d=, — —. = ae, and that CX=--^ = -. I - e2 g From the symmetry of the equation a;2 y2 a2 + 62-J' it is clear that there ...is another focus, namely, the point {ae, 0) ; and another directrix, the line aj = -, with regard to the axes through the point C. 86 THE CONIC SECTIONS The axis of x is in this case called the major axis, and the axis of y the minor axis. The one is of length 2a ; the other of length 2h. If h had been greater than a, the foci would have lain upon the axis of y, and this axis would have been the major axis. When a and h are known, the eccentricity e is given by In the circle a—h^ and e = 0.
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