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## Derived Trigonometric Functions for Siebel VB

Table 8 lists the trigonometric functions available in Siebel VB.

Table 8.  Derived Trigonometric Functions
Function
Computed By

ArcCoSecant

ArcCoSec(x) = Atn(x/Sqr(x*x-1))+(Sgn(x)-1)*1.5708

ArcCosine

ArcCos(x) = Atn(-x/Sqr(-x*x+1))+1.5708

ArcCoTangent

ArcTan(x) = Atn(x)+1.5708

ArcSecant

ArcSec(x) = Atn(x/Sqr(x*x-1))+Sgn(x-1)*1.5708

ArcSine

ArcSin(x) = Atn(x/Sqr(-x*x+1))

CoSecant

CoSec(x) = 1/Sin(x)

CoTangent

CoTan(x) = 1/Tan(x)

Hyperbolic ArcCoSecant

HArcCoSec(x) = Log((Sgn(x)*Sqr(x*x+1)+1)/x)

Hyperbolic ArcCosine

HArcCos(x) = Log(x+Sqr(x*x-1))

Hyperbolic ArcCoTangent

HArcCoTan(x) = Log((x+1)/(x-1))/2

Hyperbolic ArcSecant

HArcSec(x) = Log((Sqr(-x*x+1)+1)/x)

Hyperbolic ArcSine

HArcSin(x) = Log(x+Sqr(x*x+1))

Hyperbolic ArcTangent

HArcTan(x) = Log((1+x)/(1-x))/2

Hyperbolic CoSecant

HCoSec(x) = 2/(Exp(x)-Exp(-x))

Hyperbolic Cosine

HCos(x) = (Exp(x)+Exp(-x))/2

Hyperbolic Cotangent

HCotan(x) = (Exp(x)+Exp(-x))/ (Exp(x)-Exp(-x))

Hyperbolic Secant

HSec(x) = 2/(Exp(x)+Exp(-x))

Hyperbolic Sine

HSin(x) = (Exp(x)-Exp(-x))/2

Hyperbolic Tangent

HTan(x) = (Exp(x)-Exp(-x))/(Exp(x)+Exp(-x))

Secant

Sec(x) = 1/Cos(x)

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