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

**Tangent of a complex or real number. **

Inverse of the ATan function.

**Examples:** Tangent(-0.5) = -0.54630248984379
Tangent(0) = 0
Tangent(0.5) = 0.54630248984379
Tangent(1) = 1.5574077246549
Tangent(1.5) = 14.1014199471717
Tangent(2) = -2.18503986326152
Tangent(2.5) = -0.74702229723866
Tangent(3) = -0.142546543074278
Tangent(3.5) = 0.374585640158595
Tangent("2.3|-4.5") = "-2.4526920983235E-04|-1.00002765174781"

**See also:** Sine Function
Cosine Function
ATan Function
TanH Function
Tan Function (Visual Basic)

**vX:** Number whose tangent 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. Copyright 1996-1999 Entisoft

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