id:A120683 - OEIS Search Results

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A120683

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

+0
2

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; cons; graph; listen)

	OFFSET	`1,3`
	COMMENT	`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: A164611 A073897 A097465 this_sequence A079313 A125132 A026184` `Adjacent sequences: A120680 A120681 A120682 this_sequence A120684 A120685 A120686`
	KEYWORD	`cons,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 24 2006`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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