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decbin> <cos
Last updated: Fri, 13 Nov 2009

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cosh

(PHP 4 >= 4.1.0, PHP 5)

cosh — 双曲余弦

说明

float cosh ( float $arg )

返回 arg 的双曲余弦值，定义为 (exp(arg) + exp(-arg))/2。

参见： cos()、 acosh()、 sin()和 tan()。



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decbin> <cos
Last updated: Fri, 13 Nov 2009
 
 
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