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There is no any example for acos() function. Please put this one below the acos() function's description.
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Example:
<?php
$arg=0.5;
$val=acos($arg);
echo "acos(" . $arg . ") = " . $val . " radians.<br/>";
echo "Pi value = " . pi() . "<br/>";
echo "acos(" . $arg . ") = " . $val/pi()*180 . " degrees<br/>";
?>
acos
(PHP 4, PHP 5)
acos — Arc cosine
Опис
float acos
( float
$arg
)
Returns the arc cosine of arg in radians.
acos() is the complementary function of
cos(), which means that
a==cos(acos(a)) for every value of a that is within
acos()' range.
Параметри
-
arg -
The argument to process
Значення, що повертаються
The arc cosine of arg in radians.
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User Contributed Notes 1 note
rahmatjon at gmail dot com ¶
3 years ago
