Find the size of cosine

public class CCC {
    public static void main(String[] args)  {
        //60° Convert to the corresponding radian  Π/3  When calling cosine function 
        BigDecimal bigDecimal = BigDecimal.valueOf(Math.cos(Math.toRadians(60.0)));
        BigDecimal bigDecimal1 = BigDecimal.valueOf(1.0);
        System.out.println(bigDecimal.divide(bigDecimal1,1,BigDecimal.ROUND_DOWN));
 }
}