**Public Function CscH( _
ByVal vX As Variant _
) As Variant**

**"Hyperbolic Cosecant" **

Hyperbolic cosecant of a real or complex number.

Inverse of the ACscH function.

**Examples:** CscH(-2) = -0.275720564771783
CscH(-1) = -0.850918128239322
IsNull(CscH(0)) = True
CscH(1) = 0.850918128239322
CscH(2) = 0.275720564771783
CscH(10) = 9.07998597121222E-05
CscH("2.3|-4.5") = "-4.10866737706438E-02|-0.19440184661157"

**See also:** Cosecant Function
CosH Function
CotH Function
SecH Function
ACscH Function
HCosec Function

**vX:** Number whose hyperbolic cosecant is returned. Function returns Null if vX is Null or cannot be fixed up to a real or complex number (as defined by the ComplexStringToReals function). Complex numbers are represented within strings as "R|I" where R is the real part and I is the imaginary part.

**Return:** The result is expressed in radians.

**Note:** Microsoft named this function HCosec within their Derived Math Function help topic. **Definition:**

2 / (Exponent(X) - Exponent(-X))

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