asin

(PHP 4, PHP 5)

asinArc sine

Опис

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.

Параметри

arg

The argument to process

Значення, що повертаються

The arc sine of arg in radians

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rahmatjon at gmail dot com
1 year ago
Hello!
Please put this example below the asin() function's description.
Thank you!

Example:
<?php
    $arg
= 0.5;
   
$val = asin($arg);
    echo
"asin(" . $arg . ") = " . $val . " radians.<br/>";
    echo
"Pi value = " . pi() . "<br/>";  
    echo
"asin(" . $arg . ") = " . $val/pi()*180 . " degrees<br/>";

   
$arg = 1;
   
$val = asin($arg);
    echo
"asin(" . $arg . ") = " . $val . " radians.<br/>";
    echo
"Pi value = " . pi() . "<br/>";  
    echo
"asin(" . $arg . ") = " . $val/pi()*180 . " degrees<br/>";
?>
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