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acos

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

acos — Arc cosine

Опис

acos(float $num): float

Returns the arc cosine of num in radians. acos() is the inverse function of cos(), which means that $num == cos(acos($num)) for every value of num that is in the domain of acos().

Параметри

num

The argument to process

Значення, що повертаються

The arc cosine of num in radians.

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