, [1, 1, 1, 1], method='broyden1', tol=1e-14)
    >>> x = res.x
    >>> x
    array([4.04674914, 3.91158389, 2.71791677, 1.61756251])
    >>> np.cos(x) + x[::-1]
    array([1., 2., 3., 4.])

    Nr