The Math.atanh()
function returns the hyperbolic arctangent of a number, that is
Math.atanh(x)
x
Because atanh()
is a static method of Math
, you always use it as Math.atanh()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Math.atanh()
Math.atanh(-2); // NaN Math.atanh(-1); // -Infinity Math.atanh(0); // 0 Math.atanh(0.5); // 0.5493061443340548 Math.atanh(1); // Infinity Math.atanh(2); // NaN
For values greater than 1 or less than -1, NaN is returned.
For , we have so this can be emulated by the following function:
Math.atanh = Math.atanh || function(x) { return Math.log((1+x)/(1-x)) / 2; };
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