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34 lines
672 B
Plaintext
34 lines
672 B
Plaintext
NAME
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acsch - inverse hyperbolic cosecant
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SYNOPSIS
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acsch(x [,eps])
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TYPES
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x nonzero real
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eps nonzero real, defaults to epsilon()
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return real
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DESCRIPTION
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Returns the acsch of x to a multiple of eps with error less in
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absolute value than .75 * eps.
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acsch(x) is the real number v for which csch(v) = x. It is given by
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acsch(x) = ln((1 + sqrt(1 + x^2))/x)
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EXAMPLE
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> print acsch(2, 1e-5), acsch(2, 1e-10), acsch(2, 1e-15), acsch(2, 1e-20)
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.48121 .4812118251 .481211825059603 .4812118250596034475
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LIMITS
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none
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LIBRARY
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NUMBER *qacsch(NUMBER *x, NUMBER *eps)
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SEE ALSO
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asinh, acosh, atanh, asech, acoth, epsilon
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