Calculate tangent in Java

//from ww  w  . j a  v a2s.  com
public class Main {
  public static void main(String[] args) {
    double rads, degs, tanA, coTanA;

    // Obtain angle in degrees from user
    degs = 120d;
    // Convert degrees to radian
    rads = Math.toRadians(degs);

    // Calculate tangent
    tanA = Math.tan(rads);
    System.out.println("Tangent = " + tanA);

  }
}