acosh

    (PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

    acosh — 反双曲余弦

    说明

    acosh(float $num): float

    返回 num 的反双曲余弦值，即其双曲余弦为 num 的那个值。

    参数

    num

    要处理的值

    返回值

    num 反双曲余弦

    参见

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