acosh - chung-leong/qb GitHub Wiki

acosh - Inverse hyperbolic cosine

float acosh( float $x )

acosh() calculates the inverse hyperbolic cosine of x, i.e. the value whose hyperbolic cosine is *x.

Parameters:

x - The number to process. It can be a scalar or an array.

Return Value:

The inverse hyperbolic cosine of x. If x is an array, then the return value will also be an array.

Version

1.0 and above.