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Decimal expansion of cos(Pi degrees). (Of course, cos(Pi radians) = -1.)
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%I #10 Nov 05 2017 21:55:00

%S 9,9,8,4,9,7,1,4,9,8,6,3,8,6,3,8,3,3,6,3,5,7,6,4,4,8,5,4,0,8,8,0,5,0,

%T 6,8,1,0,1,3,6,2,3,2,0,2,6,7,3,8,6,5,0,3,5,1,6,5,7,7,0,8,3,4,0,8,7,8,

%U 9,7,4,8,0,4,6,7,8,0,3,7,4,0,4,3,2,5,9,1,8,8,9,5,5,3,9,7,7,6,3

%N Decimal expansion of cos(Pi degrees). (Of course, cos(Pi radians) = -1.)

%e cos( Pi^2 / 180 ) = .99849714986...

%t RealDigits[Cos[Pi Degree],10,120][[1]] (* _Harvey P. Dale_, May 28 2014 *)

%o (PARI) cos(Pi^2/180) \\ _Charles R Greathouse IV_, Nov 05 2017

%Y Cf. A051553, A051555, A051557-A051559.

%K nonn,cons,easy

%O 0,1

%A _N. J. A. Sloane_