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Math Functions (trigonometry)

this here is a whole bunch of math functions! Too many for me to list right here so come in and check em' all out

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Public Function InvSin(Number As Double) As Double
 InvSin = CutDecimal(Atn(Number / Sqr(-Number * Number + 1)), 87)
End Function
Public Function InvCos(Number As Double) As Double
 InvCos = Atn(-Number / Sqr(-Number * Number + 1)) + 2 * Atn(1)
End Function
Public Function InvSec(Number As Double) As Double
 InvSec = Atn(Number / Sqr(Number * Number - 1)) + Sgn((Number) - 1) * (2 * Atn(1))
End Function
Public Function InvCsc(Number As Double) As Double
 InvCsc = Atn(Number / Sqr(Number * Number - 1)) + (Sgn(Number) - 1) * (2 * Atn(1))
End Function
Public Function InvCot(Number As Double) As Double
 InvCot = Atn(Number) + 2 * Atn(1)
End Function
Public Function Sec(Number As Double) As Double
 Sec = 1 / Cos(Number * PI / 180)
End Function
Public Function Csc(Number As Double) As Double
 Csc = 1 / Sin(Number * PI / 180)
End Function
Public Function Cot(Number As Double) As Double
 Cot = 1 / Tan(Number * PI / 180)
End Function
Public Function HSin(Number As Double) As Double
 HSin = (Exp(Number) - Exp(-Number)) / 2
End Function
Public Function HCos(Number As Double) As Double
 HCos = (Exp(Number) + Exp(-Number)) / 2
End Function
Public Function HTan(Number As Double) As Double
 HTan = (Exp(Number) - Exp(-Number)) / (Exp(Number) + Exp(-Number))
End Function
Public Function HSec(Number As Double) As Double
 HSec = 2 / (Exp(Number) + Exp(-Number))
End Function
Public Function HCsc(Number As Double) As Double
 HCsc = 2 / (Exp(Number) + Exp(-Number))
End Function
Public Function HCot(Number As Double) As Double
 HCot = (Exp(Number) + Exp(-Number)) / (Exp(Number) - Exp(-Number))
End Function
Public Function InvHSin()
 InvHSin = Log(Number + Sqr(Number * Number + 1))
End Function
Public Function InvHCos(Number As Double) As Double
 InvHCos = Log(Number + Sqr(Number * Number - 1))
End Function
Public Function InvHTan(Number As Double) As Double
 InvHTan = Log((1 + Number) / (1 - Number)) / 2
End Function
Public Function InvHSec(Number As Double) As Double
 InvHSec = Log((Sqr(-Number * Number + 1) + 1) / Number)
End Function
Public Function InvHCsc(Number As Double) As Double
 InvHCsc = Log((Sgn(Number) * Sqr(Number * Number + 1) + 1) / Number)
End Function
Public Function InvHCot(Number As Double) As Double
 InvHCot = Log((Number + 1) / (Number - 1)) / 2
End Function
Public Function Percent(is_ As Double, of As Double) As Double
 Percent = is_ / of * 100
End Function