acosh

(PHP 4 >= 4.1.0, PHP 5)

acosh -- 反双曲余弦

说明

float acosh ( float arg )

返回 arg 的反双曲余弦值,即,其双曲余弦为 arg 的那个值。

注: 本函数未在 Windows 平台下实现。

参见 acos()asinh(), 和 atanh()


add a note add a note User Contributed Notes
DarkRed2006 at hotmail dot com
16-Jan-2006 11:13
This feature should have been included for Windows Platforms.

I'd post a function but oh, that's right I can't. Because I couldn't test to see if it worked.