Inverse hyperbolic cosine
= Inverse hyperbolic cosine
{title2=$\operatorname{arcosh}$}
For $x\geq1$, the inverse <hyperbolic cosine> on its nonnegative real branch is $\operatorname{arcosh}x=\log(x+\sqrt{x^2-1})$.
= Inverse hyperbolic cosine
{title2=$\operatorname{arcosh}$}
For $x\geq1$, the inverse <hyperbolic cosine> on its nonnegative real branch is $\operatorname{arcosh}x=\log(x+\sqrt{x^2-1})$.