How to solve this equation in java?

Question

Java

Hello! there is an equation:

In general, I have no idea how to solve it, but I did it like this:

public static void main(String[] args) {
        double x;
        double y;
        Scanner scan = new Scanner(System.in);
        System.out.println("Введите х:");
        double user = scan.nextDouble();
        if(user > 0){
           double a =  Math.sin(2) * user;
            System.out.println(a);
        }
        else {
            double b = 1 - 2 * Math.sin(Math.pow(user,2));
        }

Question: Am I doing everything right or not? if not, what should be done?

Answer 1

Math.pow(Math.sin(user), 2) // (sinX)^2
Math.sin(Math.pow(user, 2)) // sin(X^2)