Funcții matematice
PHP Manual

asin

(PHP 4, PHP 5)

asinArc sine

Descrierea

float asin ( float $arg )

Returns the arc sine of arg in radians. asin() is the complementary function of sin(), which means that a==sin(asin(a)) for every value of a that is within asin()'s range.

Parametri

arg

The argument to process

Valorile întoarse

The arc sine of arg in radians

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Funcții matematice
PHP Manual