Returns the Inverse of rotation.

	// Sets this transform to have the opposite rotation of the target
	var target : Transform;
	function Update () {
		transform.rotation = Quaternion.Inverse(target.rotation);
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public Transform target;
    void Update() {
        transform.rotation = Quaternion.Inverse(target.rotation);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public target as Transform

	def Update() as void:
		transform.rotation = Quaternion.Inverse(target.rotation)