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A195711
Decimal expansion of arccos(-sqrt(5/8)).
2
2, 4, 8, 2, 5, 3, 4, 6, 1, 7, 7, 6, 3, 3, 8, 4, 2, 5, 5, 5, 8, 9, 8, 1, 1, 2, 5, 5, 9, 5, 6, 4, 8, 2, 6, 4, 9, 2, 7, 3, 9, 7, 3, 9, 1, 6, 0, 7, 9, 7, 4, 8, 4, 6, 2, 5, 4, 8, 1, 7, 0, 3, 3, 3, 6, 0, 1, 1, 4, 9, 8, 3, 4, 9, 5, 5, 1, 6, 7, 3, 6, 0, 1, 7, 6, 9, 0, 0, 4, 9, 0, 1, 2, 0, 5, 9, 5, 1, 0, 1
OFFSET
1,1
FORMULA
Equals Pi - arcsin(sqrt(3/8)) = Pi - arctan(sqrt(3/5)). - Amiram Eldar, Jul 06 2023
EXAMPLE
2.48253461776338...
MATHEMATICA
(See A195707.)
RealDigits[ArcCos[-Sqrt[(5/8)]], 10, 120][[1]] (* Harvey P. Dale, Mar 12 2013 *)
PROG
(PARI) acos(-sqrt(5/8)) \\ G. C. Greubel, Aug 19 2018
(Magma) SetDefaultRealField(RealField(100)); Arccos(-Sqrt(5/8)); // G. C. Greubel, Aug 19 2018
CROSSREFS
Cf. A195707.
Sequence in context: A175131 A033921 A167420 * A200610 A076232 A011032
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved