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Showing content from https://developer.cdn.mozilla.net/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/asinh below:

Math.asinh() - JavaScript | MDN

Math.asinh()

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The Math.asinh() static method returns the inverse hyperbolic sine of a number. That is,

𝙼𝚊𝚝𝚑.𝚊𝚜𝚒𝚗𝚑 ( 𝚡 ) = arsinh ( x ) = the unique  y  such that  sinh ( y ) = x = ln ( x + x2 + 1 ) \begin{aligned}\mathtt{\operatorname{Math.asinh}(x)} &= \operatorname{arsinh}(x) = \text{the unique } y \text{ such that } \sinh(y) = x \\&= \ln\left(x + \sqrt{x^2 + 1}\right)\end{aligned} Try it 
console.log(Math.asinh(1));
// Expected output: 0.881373587019543

console.log(Math.asinh(0));
// Expected output: 0

console.log(Math.asinh(-1));
// Expected output: -0.881373587019543

console.log(Math.asinh(2));
// Expected output: 1.4436354751788103
Syntax Parameters Return value

The inverse hyperbolic sine of x.

Description

Because asinh() is a static method of Math, you always use it as Math.asinh(), rather than as a method of a Math object you created (Math is not a constructor).

Examples Using Math.asinh() 
Math.asinh(-Infinity); // -Infinity
Math.asinh(-1); // -0.881373587019543
Math.asinh(-0); // -0
Math.asinh(0); // 0
Math.asinh(1); // 0.881373587019543
Math.asinh(Infinity); // Infinity
Specifications Browser compatibility See also

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