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

**"Secant" **

Secant of a complex or real number.

Inverse of the ASec function.

**Examples:** Secant(-0.5) = 1.13949392732455
Secant(0) = 1
Secant(0.5) = 1.13949392732455
Secant(1) = 1.85081571768093
Secant(1.5) = 14.1368329029699
Secant(2) = -2.40299796172238
Secant(2.5) = -1.24821565146882
Secant(3) = -1.01010866590799
Secant(3.5) = -1.06785504719181
Secant("2.3|-4.5") = "-1.48055525157198E-02|-1.65664869105198E-02"

**See also:** Sine Function
Cotangent Function
Cosecant function
ASec Function
SecH Function
Sec Function

**vX:** Number whose secant 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 Sec within their Derived Math Function help topic. Copyright 1996-1999 Entisoft

Entisoft Tools is a trademark of Entisoft.