三角函数

Function Sec(X) As Double '正割    Sec = 1 / Cos(Angle)End FunctionFunction Csc(X) As Double '余割    Csc = 1 / Sin(Angle)End FunctionFunction Cot(X) As Double '余切    Cot = 1 / Tan(Angle)End FunctionFunction ArcSin(X) As Double '反正弦    ArcSin = Atn(X / Sqr(-X * X + 1))End FunctionFunction ArcCos(X) As Double '反余弦    ArcCos = Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)End FunctionFunction ArcSec(X) As Double '反正割    ArcSec = Atn(X / Sqr(X * X - 1)) + Sgn((X) - 1) * (2 * Atn(1))End FunctionFunction ArcCsc(X) As Double '反余割    ArcCsc = Atn(X / Sqr(X * X - 1)) + (Sgn(X) - 1) * (2 * Atn(1))End FunctionFunction ArcCot(X) As Double '反余切    ArcCot = Atn(X) + 2 * Atn(1)End FunctionFunction HSin(X) As Double '双曲正弦    HSin = (Exp(X) - Exp(-X)) / 2End FunctionFunction HCos(X) As Double '双曲余弦    HCos = (Exp(X) + Exp(-X)) / 2End FunctionFunction HTan(X) As Double '双曲正切    HTan = (Exp(X) - Exp(-X)) / (Exp(X) + Exp(-X))End FunctionFunction HSec(X) As Double '双曲正割    HSec = 2 / (Exp(X) + Exp(-X))End FunctionFunction HCsc(X) As Double '双曲余割    HCsc = 2 / (Exp(X) - Exp(-X))End FunctionFunction HCot(X) As Double '双曲余切    HCot = (Exp(X) + Exp(-X)) / (Exp(X) - Exp(-X))End FunctionFunction HArcsin(X) As Double '反双曲正弦    HArcsin = Log(X + Sqr(X * X + 1))End FunctionFunction HArccos(X) As Double '反双曲余弦    HArccos = Log(X + Sqr(X * X - 1))End FunctionFunction HArctan(X) As Double '反双曲正切    HArctan = Log((1 + X) / (1 - X)) / 2End FunctionFunction HArcsec(X) As Double '反双曲正割    HArcsec = Log((Sqr(-X * X + 1) + 1) / X)End FunctionFunction HArccsc(X) As Double '反双曲余割    HArccsc = Log((Sgn(X) * Sqr(X * X + 1) + 1) / X)End FunctionFunction HArccot(X) As Double '反双曲余切    HArccot = Log((X + 1) / (X - 1)) / 2End FunctionFunction LogN(N, X) '以 N 为底的对数    LogN = Log(X) / Log(N)End Function