OFFSET
0,1
LINKS
Eric Weisstein's World of Mathematics, Fresnel Integrals.
Wikipedia, Fresnel integral.
FORMULA
From Amiram Eldar, Feb 06 2022: (Start)
Equals Integral_{x=0..1} cos(Pi*x^2/2) dx.
Equals Sum_{k>=0} (-1)^k * (Pi/2)^(2*k)/((2*k)!*(4*k + 1)). (End)
EXAMPLE
0.77989340037682282947420641365269013663062570813632...
MATHEMATICA
RealDigits[ FresnelC[1], 10, 105][[1]]
PROG
(PARI) intnum(x=0, 1, cos(Pi*x^2/2)) \\ Michel Marcus, Feb 06 2022
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Robert G. Wilson v, Oct 11 2004
STATUS
approved