class Seno
{
  double calculaSeno( double x)
  {
    double termo = x;
    double soma = 0.0;
    int k = 2;
    
    while (termo * termo > 1e-5 * 1e-5)
    {
      soma = soma + termo;
      termo = termo * (-1.0) * x * x;
      termo = termo / (k * (k + 1));
      k = k + 2;      
    }
    return soma;
  }
  double calculaLN( double x)
  {
    double termo = x;
    double soma = 0.0;
    int k = 1;
    
    while (termo * termo > 1e-20)
    {
      soma = soma + (termo / k);
      termo = termo * (-1.0) * x;
      k = k + 1;
    }
    return soma;
  }
  double calculaCos( double x)
  {
    double soma = 1.0;
    double termo = 1.0;
    int k = 1;
    
    while (termo * termo > 1e-10)
    {
      termo = termo * -1.0 * x * x;
      termo = termo / (k * (k + 1));
      k = k + 2;
      soma = soma + termo;
    }
    return soma;
  }
  void test()
  {
    double x = 0.0;
    double soma;
    if (calculaCos(0.0) < 0.9999 || calculaCos(0.0) > 1.0001)
      System.out.println("Erro no c‡lculo do Cosseno de 0.0");
    while (x <= 1.0)
    {
      soma = calculaCos(x) * calculaCos(x) + calculaSeno(x) * calculaSeno(x);
      if (soma < 0.9999 || soma > 1.0001)
        System.out.println("Sen ou Cos n‹o funcionou para " + x);
      x = x + 0.01;
    }
    System.out.println("Fim dos testes");
  }
}