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tanh

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

tanh双曲正切

说明

float tanh ( float $arg )

返回 arg 的双曲正切值,定义为 sinh(arg)/cosh(arg)

参数

arg

要处理的参数

返回值

arg 的双曲正切值

参见

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