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<acosasin>
Last updated: Mon, 16 Jul 2012

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: 本函数不适用于 Windows 平台。

参见 acos()asinh()atanh()




<acosasin>
 Last updated: Mon, 16 Jul 2012
 
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