asin

    (PHP 4, PHP 5, PHP 7, PHP 8)

    asin — Arc sine

    Description

    asin(float$num): float

    Returns the arc sine of num in radians. asin() is the inverse function of sin(), which means that $num == sin(asin($num)) for every value of num that is in the domain of asin().

    Parameters

    num

    The argument to process

    Return Values

    The arc sine of num in radians

    See Also

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