Reversing rotation on one axis

Questions & Answers
1

I want to mirror an objects x axis, so if one object rotates left, the other one rotates right.

How can i make this work in only one axis?

var master : Transform;
var slave : Transform;

function Update () {
    
    slave.rotation = Quaternion.Inverse(master.rotation);       
}
2

Give this a try:

var master : Transform;
var slave : Transform;

function Update()
{
  slave.eulerAngles = -master.eulerAngles;
}