Development Assistance Minecart Rotation in a circle ! using Math

hi i have a question how can i rotate All the minecarts in a cicular path like this \/ gif

Video from what i have now


But my code needs to be like this in a Bukkit Runnable

My code what i have now :

Code:

import static org.bukkit.ChatColor.*;

import java.util.ArrayList;

import nl.Wesley.Main.SettingsManager;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.Sound;
import org.bukkit.World;
import org.bukkit.block.Sign;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Minecart;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.block.SignChangeEvent;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.util.Vector;

public class FreeFall implements Listener {
 
    static SettingsManager settings = SettingsManager.getInstance();
    static ArrayList<Entity> FreeFallminecarts = new ArrayList<Entity>();
    static int i = 0;
    static boolean RUNFreeFall = false;
    static boolean SPAWNFreeFall = true;
    static double angle;
    static float radius = 4.0f;
    static double cos = 1;
    static double sin ;
 
    public static void StopFreeFall() {
        for(Entity entity : FreeFallminecarts) {
            i = 0;
            RUNFreeFall = false;
            SPAWNFreeFall = true;
            entity.remove();
        }
    }
  
    public static void SpawnFreeFall() {
        if (SPAWNFreeFall == true) {
            double x;
            double z;
            final World world = Bukkit.getServer().getWorlds().get(0);
            Location loc = new Location(world, -111.5, 64, 40.5);
            for (int i = 0; i < 1; i++) {
                angle = 2 * Math.PI * i / 1;
                z = Math.sin(angle) * radius;
                x = Math.cos(angle) * radius;
                loc.add(x, 0, z);
                final Minecart minecart = (Minecart) world.spawnEntity(loc, EntityType.MINECART);
                minecart.setFlyingVelocityMod(new Vector(0f, 0f, 0f));
                minecart.setSlowWhenEmpty(false);
                minecart.setCustomName("FreeFall");
             
                FreeFallminecarts.add(minecart);
                loc.subtract(x, 0, z);
                SPAWNFreeFall = false;
            }
        } else {
             SPAWNFreeFall = false;
        }
    }
    public static void RunFreeFall() {
        if (RUNFreeFall == true && SPAWNFreeFall == false) {
                new BukkitRunnable() {
                    public void run() {
                        if (RUNFreeFall == true) {
                            i += 1;
                        } else {
                            RUNFreeFall = false;
                            cancel();
                            i = 0;
                        }
                        for (Entity entity : FreeFallminecarts) {
                        if (entity.getCustomName().equalsIgnoreCase("FreeFall")) {
                            if (i >= 1 && !(i >= 309)) {
                                entity.setVelocity(new Vector(0f, 0.20f, 0f));
                            }
                            if (i >= 310 && !(i >= 334)) {
                                entity.setVelocity(new Vector(0f, -1f, 0f));
                            }
                            if (i >= 335 && !(i >= 384)) {
                                entity.setVelocity(new Vector(0f, 0.5f, 0f));
                            }
                            if (i >= 385 && !(i >= 434)) {
                                entity.setVelocity(new Vector(0f, -0.70f, 0f));
                            }
                            if (i >= 435 && !(i >= 464)) {
                                entity.setVelocity(new Vector(0f, -0.10f, 0f));
                            }
                            if (i >= 465 && !(i >= 529)) {
                                entity.setVelocity(new Vector(0f, -0.01f, 0f));
                            }
                            if (i >= 630) {
                                entity.setVelocity(new Vector(0f, 0f, 0f));
                                cancel();
                                i = 0;
                                RUNFreeFall = false;
                            }
                        }

                    }
                }
            }.runTaskTimer(settings.getPlugin(), 0, 1);
        } else {
            i = 0;
            RUNFreeFall = false;

        }
    }

 

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it is still open some can help me ?