固有数学函数派生的非固有数学函数
本帖最后由 1291500406 于 2019-12-5 00:10 编辑下列是由固有数学函数派生的非固有数学函数：
函数派生的等效公式
Secant（正割）Sec(X) =1 / Cos(X)
Cosecant（余割）Cosec(X) =1 / Sin(X)
Cotangent（余切）Cotan(X) =1 / Tan(X)
Inverse Sine（反正弦）Arcsin(X) =Atn(X / Sqr(-X * X + 1))
Inverse Cosine（反余弦）Arccos(X) =Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)
Inverse Secant（反正割）Arcsec(X) =Atn(X / Sqr(X * X - 1)) + Sgn((X) -1) * (2 * Atn(1))
Inverse Cosecant（反余割）Arccosec(X) =Atn(X / Sqr(X * X - 1)) + (Sgn(X) - 1) * (2 * Atn(1))
Inverse Cotangent（反余切）Arccotan(X) =Atn(X) + 2 * Atn(1)
Hyperbolic Sine（双曲正弦）HSin(X) =(Exp(X) - Exp(-X)) / 2
Hyperbolic Cosine（双曲余弦）HCos(X) =(Exp(X) + Exp(-X)) / 2
Hyperbolic Tangent（双曲正切）HTan(X) =(Exp(X) - Exp(-X)) / (Exp(X) + Exp(-X))
Hyperbolic Secant（双曲正割）HSec(X) =2 / (Exp(X) + Exp(-X))
Hyperbolic Cosecant（双曲余割）HCosec(X) =2 / (Exp(X) - Exp(-X))
Hyperbolic Cotangent（双曲余切）HCotan(X) =(Exp(X) + Exp(-X)) / (Exp(X) - Exp(-X))
Inverse Hyperbolic Sine（反双曲正弦）HArcsin(X) =Log(X + Sqr(X * X + 1))
Inverse Hyperbolic Cosine（反双曲余弦）HArccos(X) =Log(X + Sqr(X * X - 1))
Inverse Hyperbolic Tangent（反双曲正切）HArctan(X) =Log((1 + X) / (1 - X)) / 2
Inverse Hyperbolic Secant（反双曲正割）HArcsec(X) =Log((Sqr(-X * X + 1) + 1) / X)
Inverse Hyperbolic Cosecant（反双曲余割）HArccosec(X) =Log((Sgn(X) * Sqr(X * X + 1) +1) / X)
Inverse Hyperbolic Cotangent（反双曲余切）HArccotan(X) =Log((X + 1) / (X - 1)) / 2
以 N 为底的对数LogN(X) =Log(X) / Log(N)
是个啥,对于1个初中三年都是混过的人来说,1个都没有看懂,干啥用的 不知道，应该是算法吧 小学刚毕业:$
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