.cos()

The .cos() method returns the trigonometric cosine of the given angle. The result is in the range [-1, 1].

Syntax

Math.cos(angle)

• angle: This is the only parameter the .cos() method takes and is expressed in radians.

Note: If the angle is NaN or Infinity, NaN is returned.

Example

The following example demonstrates the application of .cos() method:

public class Check {
  public static void main(String args[]) {
    // convert degrees to radians
    double pi = Math.PI;
    double degree = 60;
    double radian = degree * pi/180;
    //to get output up to the first decimal place
    double roundedResult = Math.round(Math.cos(radian) * 10.0) / 10.0;

    System.out.println("Cosine of 60 degrees is " + roundedResult);
  }
}

The above example results in the following output:

Cosine of 60 degrees is 0.5