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33 lines
638 B
Plaintext
33 lines
638 B
Plaintext
NAME
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coth - hyperbolic cotangent
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SYNOPSIS
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coth(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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Calculate the coth of x to a multiple of eps with error less in
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absolute value than .75 * eps.
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coth(x) = (exp(2*x) + 1)/(exp(2*x) - 1)
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EXAMPLE
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> print coth(1, 1e-5), coth(1, 1e-10), coth(1, 1e-15), coth(1, 1e-20)
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1.31304 1.3130352855 1.313035285499331 1.31303528549933130364
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LIMITS
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unlike sin and cos, x must be real
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x != 0
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eps > 0
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LIBRARY
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NUMBER *qcoth(NUMBER *x, NUMBER *eps)
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SEE ALSO
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sinh, cosh, tanh, sech, csch, epsilon
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