C_ACOSECH
Returns the inverse hyperbolic cosecant[1] of a complex number
Syntax:
C_ACOSECH(complex_number)
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Weisstein, Eric W.
"Inverse Hyperbolic Cosecant."
From MathWorld--A Wolfram Web Resource.
http://mathworld.wolfram.com/InverseHyperbolicCosecant.html