sin负一次方在VB上怎么表达？

Question

cos呢？ tan呢？ 追加！！

Answer 1

基本函数有：Abs 函数Atn 函数Cos 函数Exp 函数Fix 函数Int 函数Log 函数Rnd 函数Sgn 函数Sin 函数Sqr 函数Tan 函数</B> 以下为导出函数函数 由基本函数导出之公式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)) / 2Hyperbolic 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)) / 2Inverse Hyperbolic Secant（反双曲正割）HArcsec(X) = Log((Sqr(-X * X + 1) + 1) / X)Inverse Hyperbolic CosecantHArccosec(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) 所以，sin-1(x)可用Atn(X / Sqr(-X * X + 1))来算，即sin-1(0.5)=Atn(0.5/Sqr(-0.5*0.5+1))算出来的结果是弧度制表示的如果想要表示为角度，则把结果乘以180/3.14159

Answer 2

30°=π/6 vb中sin()的参数是弧度,你先要吧角度换成弧度sin 30° 的负一次方 就用这个dim r as doubler=1/sin(3.14159268535897/6)print r cos tan 类似

Answer 3

1、1/sin(0.5)2、(sin(0.5))^(-1)很显然方法1好于方法2，这不光是清晰，并且计算速度更快。