atan2() - Return the Tangent of a/b in Java

 
//atan2() - Return the  Tangent of a/b
import java.lang.Math.*;
class Demotan2
{
public static void main(String args[])
{
System.out.println("Atan2 of -0.9 is" + Math.atan2(-0.9,0.1));
}
}


Output:
Atan2 of -0.9 is-1.460139105621001