Search: id:A140242
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%I A140242
%S A140242 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,
%T A140242 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,
%U A140242 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
%N A140242 Decimal expansion of arccos(11/16).
%C A140242 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.
%C A140242 A140240 + A140242 + A140244 = arccos(7/8) + arccos(11/16) + arccos(-1/
               4) = Pi.
%F A140242 arccos(11/16) = arcsin(3*sqrt(15)/16) = arctan(3*sqrt(15)/11).
%e A140242 0.81275556136866065877434938065861852534200350039703832958570095993218302170...
%o A140242 (PARI) acos(11/16)
%Y A140242 Cf. A140239, A140240, A140241, A140243, A140244, A140245, A140246, A140247, 
               A140248, A140249.
%Y A140242 Sequence in context: A077464 A088373 A154167 this_sequence A156944 A021127 
               A010155
%Y A140242 Adjacent sequences: A140239 A140240 A140241 this_sequence A140243 A140244 
               A140245
%K A140242 cons,nonn
%O A140242 0,1
%A A140242 Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 14 2008

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