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

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, 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, 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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy
• cons

Examples

			0.999624216...
		

Crossrefs

Cf. A051553-A051555, A051558, A051559.

Programs

Maple

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

Mathematica

RealDigits[Cos[Pi/2 Degree],10,120][[1]] (* Harvey P. Dale, Sep 21 2011 *)

PARI

cos(Pi^2/360) \\ Charles R Greathouse IV, Nov 05 2017