потому что в JavaScript

import java.lang.*;

 class MathDemo {

   public static void main(String[] args) {

      // get two double numbers
      double x = 45.0;
      double y = 180.0;
   
      // convert them to radians
      x = Math.toRadians(x);
      y = Math.toRadians(y);

      // print their cosine
      System.out.println("Math.cos(" + x + ")=" + Math.cos(x));
      System.out.println("Math.cos(" + y + ")=" + Math.cos(y));
   }
}
AMS#79