Something

float x;
float y;
float mx;
float my;
float angle;

if (hackStatus[14] == true) {
	for ( int draw = 1; draw < 1000; draw++ ) {
		angle = atan2(mapmouse(*playerid)->y - getplayerhand(*playerid)->y, mapmouse(*playerid)->x - getplayerhand(*playerid)->x);
		mx = *bulletSpeed * cos(angle);
		my = (*bulletSpeed * sin(angle)) + 0.135f;
		x = (x + mx) * 0.99f;
		y = (y + my) * 0.99f;
		drawlineonmap(0xCFC4C4C4,x,y,mx,my,m_pD3Ddev);
	}
}