Not working well with X(trigonometric function)

for ($i = 1; $i <= 2; $i=$i+0.2) {
$yaw = $p->yaw;
$right = $yaw + 180;
$x = cos(($yaw+180) * M_PI / 180) * $i + $p->x;
$z = sin(($yaw+270) * M_PI / 180) * 1 + $p->z;
$p->getLevel()->addParticle(new FlameParticle(new Vector3($x, $p->y+1, $z)));
}

I made like this but it works well on looking z coordinate but when I start changing looking to x it changes become smaller and smaller and wrong.

What should I do to make working well in X too?

 

https://forums.pmmp.io/threads/how-...k-from-player-as-much-as-0-5.9076/#post-69049