php mengubah derajat menjadi radian
//converts a given degree to a radians value
<?php
deg2rad(45); // 0.785398163397
Literate Lentil
//converts a given degree to a radians value
<?php
deg2rad(45); // 0.785398163397
//converst radians number into degrees
<?php
echo rad2deg(M_PI_4); // 45
?>