id:A019890 - OEIS Search Results

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A019890

Decimal expansion of sine of 81 degrees.

+0
1

9, 8, 7, 6, 8, 8, 3, 4, 0, 5, 9, 5, 1, 3, 7, 7, 2, 6, 1, 9, 0, 0, 4, 0, 2, 4, 7, 6, 9, 3, 4, 3, 7, 2, 6, 0, 7, 5, 8, 4, 0, 6, 8, 6, 1, 5, 8, 9, 8, 8, 0, 4, 3, 4, 9, 2, 3, 9, 0, 4, 8, 0, 1, 6, 3, 8, 0, 7, 2, 9, 3, 5, 9, 6, 9, 7, 1, 2, 7, 3, 5, 7, 1, 1, 9, 6, 3, 0, 3, 7, 9, 9, 9, 8, 8, 6, 7, 7, 8 (list; cons; graph; listen)

	OFFSET	`0,1`
	FORMULA	`Equals cos(Pi/20)=sqrt[(1+A019881)/2] = sqrt(1-A019818^2)= sqrt[5-sqrt(5)][sqrt(5)+sqrt{5+2sqrt(5)}]/(4*sqrt(5)] - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 18 2006`
	CROSSREFS	`Sequence in context: A090671 A132673 A107927 this_sequence A066666 A021905 A163243` `Adjacent sequences: A019887 A019888 A019889 this_sequence A019891 A019892 A019893`
	KEYWORD	`nonn,cons`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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