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A195709
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Decimal expansion of arctan(sqrt(2/5)).
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3
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5, 6, 3, 9, 4, 2, 6, 4, 1, 3, 6, 0, 6, 2, 8, 8, 4, 2, 6, 9, 3, 8, 3, 1, 1, 7, 2, 1, 8, 3, 7, 4, 6, 8, 4, 7, 8, 5, 1, 8, 5, 9, 5, 3, 9, 3, 0, 4, 2, 5, 6, 7, 8, 3, 7, 5, 7, 2, 4, 2, 6, 6, 4, 2, 6, 6, 9, 2, 6, 2, 7, 9, 6, 5, 7, 8, 7, 4, 1, 2, 3, 6, 4, 0, 9, 2, 9, 4, 5, 7, 1, 8, 8, 3, 8, 4, 5, 1, 4, 2
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OFFSET
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0,1
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LINKS
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EXAMPLE
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arctan(sqrt(2/5)) = 0.5639426413606...
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MATHEMATICA
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r = Sqrt[1/5]; s = Sqrt[2/5];
N[ArcSin[r], 100]
N[ArcCos[r], 100]
N[ArcTan[r], 100]
N[ArcCos[-r], 100]
N[ArcSin[s], 100]
N[ArcCos[s], 100]
N[ArcTan[s], 100]
N[ArcCos[-s], 100]
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PROG
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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