A140242 Decimal expansion of arccos(11/16).

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.

Links

Table of n, a(n) for n=0..104.

Index entries for transcendental numbers

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)

Crossrefs

Cf. A140239, A140240, A140241, A140243, A140244, A140245, A140246, A140247, A140248, A140249.

Sequence in context: A088373 A375212 A154167 * A156944 A371855 A227424

Adjacent sequences: A140239 A140240 A140241 * A140243 A140244 A140245

Keyword

cons,nonn

Author

Rick L. Shepherd, May 14 2008

Status

approved