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 A051557 Decimal expansion of cos(Pi/2 degrees). (Of course, cos(Pi/2 radians) = 0.) 5

%I

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

%T 9,5,9,0,0,7,1,3,7,3,5,0,7,1,2,2,2,3,6,1,8,0,8,1,2,7,1,9,5,2,7,9,2,8,

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

%N Decimal expansion of cos(Pi/2 degrees). (Of course, cos(Pi/2 radians) = 0.)

%e 0.999624216...

%p evalf(cos(Pi^2/360)) ;

%t RealDigits[Cos[Pi/2 Degree],10,120][[1]] (* _Harvey P. Dale_, Sep 21 2011 *)

%o (PARI) cos(Pi^2/360) \\ _Charles R Greathouse IV_, Nov 05 2017

%Y Cf. A051553-A051555, A051558, A051559.

%K nonn,easy,cons

%O 0,1

%A _N. J. A. Sloane_

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Last modified February 16 21:37 EST 2020. Contains 331975 sequences. (Running on oeis4.)