code: def sin(self):
      r"""Computes the sine of the input using sin(x) = Im{exp(i * x)}
  
      Args:
          iterations (int): for approximating exp(i * x)
      """
      return cossin(self)[1]
  
file_path: CrypTen/crypten/common/functions/approximations.py
imports: import math
  import crypten
  import torch
  from crypten.config import cfg
label_desc: Use image node_id 9 for calling a global function with example usage: sin() and returns: cossin