login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A051557 Decimal expansion of cos(Pi/2 degrees). (Of course, cos(Pi/2 radians) = 0.) 5
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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..98.

EXAMPLE

0.999624216...

MAPLE

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

MATHEMATICA

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

PROG

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

CROSSREFS

Cf. A051553-A051555, A051558, A051559.

Sequence in context: A111591 A258814 A146488 * A146491 A112118 A111590

Adjacent sequences:  A051554 A051555 A051556 * A051558 A051559 A051560

KEYWORD

nonn,easy,cons

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 21 11:11 EST 2020. Contains 331105 sequences. (Running on oeis4.)