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A140242
Decimal expansion of arccos(11/16).
11
8, 1, 2, 7, 5, 5, 5, 6, 1, 3, 6, 8, 6, 6, 0, 6, 5, 8, 7, 7, 4, 3, 4, 9, 3, 8, 0, 6, 5, 8, 6, 1, 8, 5, 2, 5, 3, 4, 2, 0, 0, 3, 5, 0, 0, 3, 9, 7, 0, 3, 8, 3, 2, 9, 5, 8, 5, 7, 0, 0, 9, 5, 9, 9, 3, 2, 1, 8, 3, 0, 2, 1, 7, 0, 0, 0, 4, 0, 8, 3, 2, 0, 7, 8, 7, 7, 1, 1, 8, 5, 9, 8, 7, 0, 1, 4, 7, 2, 9, 1, 7, 5, 7, 9, 6
OFFSET
0,1
COMMENTS
Angle in radians of the larger acute angle of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths.
A140240 + A140242 + A140244 = arccos(7/8) + arccos(11/16) + arccos(-1/4) = Pi.
FORMULA
arccos(11/16) = arcsin(3*sqrt(15)/16) = arctan(3*sqrt(15)/11).
EXAMPLE
0.81275556136866065877434938065861852534200350039703832958570095993218302170...
MATHEMATICA
RealDigits[ArcCos[11/16], 10, 120][[1]] (* Harvey P. Dale, Aug 15 2024 *)
PROG
(PARI) acos(11/16)
KEYWORD
cons,nonn
AUTHOR
Rick L. Shepherd, May 14 2008
STATUS
approved