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Mathf.Cos  

static function Cos (f : float) : float

Description

Returns the cosine of angle f in radians.

JavaScripts
print (Mathf.Cos(3));

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
print(Mathf.Cos(3));
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Awake():
print(Mathf.Cos(3))