rad2deg(): Convert Radian to Degree

$radians = pi() / 2;
echo rad2deg($radians); // 90

<?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 
?>

float rad2deg(float $radians);

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
?>

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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