Math.tanh()Math.tanh() 静态方法返回数字的双曲正切。那是, ¥The Math.tanh() static method returns the hyperbolic tangent of a number. That is, 𝙼𝚊𝚝𝚑.𝚝𝚊𝚗𝚑 ( 𝚡 ) = tanh ( x ) = sinh ( x ) cosh ( x ) = e x − e − x e x + e − x = e 2 x − 1 e 2 x + 1 \mathtt{\operatorname{Math.tanh}(x)} = \tanh(x) = \frac{\sinh(x)}{\cosh(x)} = \frac{\mathrm{e}^x - \mathrm{e}^{-x}}{\mathrm{e}^x + \mathrm{e}^{-x}} = \frac{\mathrm{e}^{2x} - 1}{\mathrm{e}^{2x}+1} Try it 语法¥Syntax jsMath.tanh(x) 参数¥Parameters x 一个号码。 返回值¥Return value x 的双曲正切。 ¥The hyperbolic tangent of x. 描述¥Description 因为 tanh() 是 Math 的静态方法,所以你始终将其用作 Math.tanh(),而不是用作你创建的 Math 对象的方法(Math 不是构造函数)。 ¥Because tanh() is a static method of Math, you always use it as Math.tanh(), rather than as a method of a Math object you created (Math is not a constructor). 示例¥Examples 使用 Math.tanh()¥Using Math.tanh() jsMath.tanh(-Infinity); // -1 Math.tanh(-0); // -0 Math.tanh(0); // 0 Math.tanh(1); // 0.7615941559557649 Math.tanh(Infinity); // 1 规范SpecificationECMAScript Language Specification # sec-math.tanh¥Specifications 浏览器兼容性BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.¥Browser compatibility 也可以看看¥See also core-js 中 Math.tanh 的 Polyfill Math.acosh() Math.asinh() Math.atanh() Math.cosh() Math.sinh()