function seno(x) {
    function fat(n) {
        if (n === 1)
            return 1;
        else {
            return n * fat(n - 1);
        }
    }
    return x - ((x ** 3) / fat(3)) + ((x ** 5) / fat(5)) - ((x ** 7) / fat(7));
}

function senoSemRecursao(x, limite = 7) {
    var result = x, sign = -1, denominador = 1;
    for (var factor = 3; factor <= limite; factor += 2) {
        denominador *= factor * (factor - 1);
        result += sign * (x ** factor) / denominador;
        sign *= -1;
    }
    return result;
}