deg2rad(): Convert Degree to Radian
<?Php
echo deg2rad(0); // Output is 0
echo "<br>";
echo deg2rad(90); // Output 1.5707963267949
echo "<br>";
echo deg2rad(180); // Output is 3.1415926535898
echo "<br>";
echo deg2rad(270); // Output is 4.7123889803847
?>deg2rad(X);deg2rad() with round()
We can use round() to remove extra decimal places.<?Php
echo round(deg2rad(90),2); // Output is 1.57
?>deg2rad() with sin() cos()
Decimal places Sin(), cos() and other trigonometric functions takes input in radian so while using if we are using data in degree then we have to convert them first and then use with Sin() , Cos() etc.<?Php
echo sin(deg2rad(90)); // Output is 1
?>
<?Php
echo sin(deg2rad(0)); // Output is 0
echo "<br>";
echo round(sin(deg2rad(180))); // Output is 0
echo "<br>";
echo sin(deg2rad(270)); // Output is -1
echo "<br>";
echo cos(deg2rad(0)); // Output is 1
echo "<br>";
echo cos(deg2rad(180)); // Output is -1
echo "<br>";
echo tan(deg2rad(45)); // Output is 1
?>Math Functions rad2deg() function
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