rad2deg(): Convert Radian to Degree

<?Php
echo rad2deg(0); // Output is 0
echo "<br>";
echo rad2deg(PI()); // Output  180
echo "<br>";
echo rad2deg(PI()/2); // Output is 90
echo "<br>";
echo rad2deg(PI()/3); // Output is 60 
?>

rad2deg(X);

Example 1: Converting a Full Circle (2π Radians)

<?php
echo rad2deg(2 * M_PI);  // Output: 360
?>

Example 2: Converting Negative Radians to Degrees

<?php
echo rad2deg(-M_PI);  // Output: -180
?>

Example 3: Converting Small Values

<?php
echo rad2deg(0.1);  // Output: 5.7295779513
?>

Example 4: Converting Half Circle

<?php
echo rad2deg(M_PI);  // Output: 180
?>

Example 5: Degrees to Radians and Back

<?php
$degrees = 45;
$radians = deg2rad($degrees);
echo rad2deg($radians);  // Output: 45
?>