OFFSET
0,1
COMMENTS
This is the height h of the isosceles triangle in a regular pentagon inscribed in the unit circle formed from a diagonal as base and two adjacent pentagon sides. h = sqrt(sqrt(3-phi)^2 - (sqrt(2 + phi)/2)^2) = sqrt(10 - 5*phi)/2 = (3 - phi)/2. - Wolfdieter Lang, Jan 07 2018
LINKS
EXAMPLE
0.6909830056250525758977065828171809411398454100971185689322756886473697685905...
MATHEMATICA
RealDigits[(3 - GoldenRatio)/2, 10, 111][[1]] (* or *)
RealDigits[(5 - Sqrt[5])/4, 10, 111][[1]] (* Robert G. Wilson v, Jan 07 2018 *)
PROG
(PARI) (5-sqrt(5))/4 \\ Charles R Greathouse IV, Aug 31 2013
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Joost Gielen, Aug 30 2013
EXTENSIONS
Extended by Charles R Greathouse IV, Aug 31 2013
STATUS
approved