(PHP 4 >= 4.1.0, PHP 5, PHP 7)
acosh — 锟斤拷双锟斤拷锟斤拷锟斤拷
$arg
) : float
锟斤拷锟斤拷 arg 锟侥凤拷双锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷双锟斤拷锟斤拷锟斤拷为
arg 锟斤拷锟角革拷值锟斤拷
arg要锟斤拷锟斤拷锟街�
The inverse hyperbolic cosine of arg
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.3.0 | This function is now available on all platforms |