A120683 - OEIS

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A120683

Decimal expansion of secant of 15 degrees (cosecant of 75 degrees).

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

	OFFSET	`1,3`
	COMMENTS	`Side length of the largest equilateral triangle that can be inscribed in a unit square (as stated in MathWorld/Weisstein link).`
	LINKS	`Eric Weisstein's World of Mathematics, Equilateral Triangle.`
	FORMULA	`a(n) = sec(Pi/12) = sec(A019679) = sqrt(6) - sqrt(2) = A010464 - A002193 = csc(5Pi/12) = 1/sin(5Pi/12) = 1/sin(10*A019691) = 1/A019884.`
	EXAMPLE	`1.03527618041008304939559535049...`
	CROSSREFS	`Cf. A019679, A019691, A019884, A010464, A002193.` `Sequence in context: A182813 A073897 A097465 * A079313 A125132 A026184` `Adjacent sequences: A120680 A120681 A120682 * A120684 A120685 A120686`
	KEYWORD	`cons,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 24 2006`

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Last modified February 15 12:25 EST 2012. Contains 205786 sequences.