OFFSET
1,4
LINKS
Eric Weisstein's World of Mathematics, Witch of Agnesi
EXAMPLE
x=1.10250582440641604357105015502222407388481058200...
MATHEMATICA
Plot[{1/(1 + x^2), Cos[x], 2 Cos[x], 3 Cos[x], 4 Cos[x]}, {x, 0, 2}]
t = x /. FindRoot[1 == (1 + x^2) Cos[x], {x, 1, 1.5}, WorkingPrecision -> 100]
RealDigits[t]
PROG
(PARI) solve(x=1, 1.5, cos(x)*(1+x^2) - 1) \\ Michel Marcus, Feb 10 2015
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 06 2011
STATUS
approved