asin

Description
Syntax
Examples
Links

Description

The asin of Math for PHP arc sine.

Syntax

asin(float $num): float

Parameters

num

The argument to process

Return

The arc sine of num in radians

Examples

1

<?

$num = sin(deg2rad(360));

$return = asin($num);

echo $return;

?>

-2.4492935982947E-16

2

<?

for($i = 0; $i <= 360; ++$i)
{
    $num = sin(deg2rad($i));
    
    $return = asin($num);
    
    echo $return . PHP_EOL;
}

?>

0
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0.17453292519943
0.15707963267949
0.13962634015955
0.1221730476396
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0.05235987755983
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0.017453292519943
1.2246467991474E-16
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