tanh

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tanh — 双曲正切

float tanh ( float $arg )

返回 arg 的双曲正切值，定义为 sinh(arg)/cosh(arg)。

参见： tan()、 atanh()、 sin()和 cos()。

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tan

Last updated: Fri, 13 Nov 2009

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Last updated: Fri Nov 27 13:31:27 2009 UTC