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 332
Fig. 28. C B : AX : S B, or CX : 26 : : a; : v/a^ -f 62 ;2hx whence CX = —p, letting S = Va^ + ^^ ^o^ … brevity. Then BX CB —CX 25 26x Fig. 29. GEOMETRICAL PROBLEMS. 99 -> x). Finally, A = ^x m 86 -x{S — x) ■= --\/x\S — X), and A = Sx^ — X*. The result is a; = |/S^, that is, the axis of the parabola is 4 the slant heightof the cone. The area of the parabola = ibS\/3. Notice that CX = |CB. Ex. 10.…
Geometry, Analytic · Calculus
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