What is Math.toDegrees() in Java?

toDegrees() is a static method that is used to convert a radian angle into approximately equivalent degree measures.

Note: toDegrees() is an approximate conversion, so it may contain some errors. For example, sin(toRadians(90.0)) cannot be exactly equal to 1.0.

Syntax

static double toDegrees(double radianAngle)

Parameters

radianAngle: An angle in radian measures.

Return value

toDegrees() returns the approximate angle value in degrees, which is of type double.

Code

In lines 11 and 13, we use Math.toDegrees() to convert argument values x and y in radian measure. We can also use this method to make our calculations easily, like in trigonometric functions.

// Load Math library
import java.lang.Math;
// Main class
public class EdPresso {
   public static void main(String[] args) {
      // get two double numbers numbers
      double x = 30;
      double y = -90;
      // convert them in degrees
      x = Math.toDegrees(x);
      System.out.println("Math.toDegrees(x)= " + x);
      y = Math.toDegrees(y);
      System.out.println("Math.toDegrees(y)= " + y);
      // Additional use in Trignomatric Functions
      System.out.println("Math.sin(" + x + ")= " + Math.sin(x));
      System.out.println("Math.sin(" + y + ")= " + Math.sin(y));
   }
}