(PHP 4 >= 4.1.0, PHP 5, PHP 7)
acosh — ��˫������
$arg
) : float
���� arg �ķ�˫������ֵ��������˫������Ϊ
arg ���Ǹ�ֵ��
argҪ�����ֵ
The inverse hyperbolic cosine of arg
| �汾 | ˵�� |
|---|---|
| 5.3.0 | This function is now available on all platforms |