A019913 - OEIS

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A019913

Decimal expansion of tangent of 15 degrees.

2, 6, 7, 9, 4, 9, 1, 9, 2, 4, 3, 1, 1, 2, 2, 7, 0, 6, 4, 7, 2, 5, 5, 3, 6, 5, 8, 4, 9, 4, 1, 2, 7, 6, 3, 3, 0, 5, 7, 1, 9, 4, 7, 4, 6, 1, 8, 9, 6, 1, 9, 3, 7, 1, 9, 4, 4, 1, 9, 3, 0, 2, 0, 5, 4, 8, 0, 6, 6, 9, 8, 3, 0, 9, 1, 1, 9, 9, 9, 6, 2, 9, 1, 8, 8, 5, 3, 8, 1, 3, 2, 4, 2, 7, 5, 1, 4, 2, 4 (list; constant; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Also, 2 - sqrt(3) = cotangent of 75 degrees. An equivalent definition of this sequence: decimal expansion of x < 1 satisfying x^2 - 4*x + 1 = 0. - Arkadiusz Wesolowski, Nov 29 2011`
	LINKS	`Anonymous, Exact trigonometric constants, Wikipedia`
	MATHEMATICA	`RealDigits[N[Tan[15 Degree], 200]][[1]] (* Arkadiusz Wesolowski, Nov 29 2011 *)`
	CROSSREFS	`Cf. A002194 (sqrt(3)).` `Sequence in context: A157671 A196747 A102046 * A047554 A206446 A079335` `Adjacent sequences: A019910 A019911 A019912 * A019914 A019915 A019916`
	KEYWORD	`nonn,cons`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 20:28 EST 2012. Contains 205962 sequences.