@pytest.mark.parametrize('lat,test_cos', [
        (60, 0.27735009811261463), (10, 0.94307531289434765),
        ([60, 10], [0.27735009811261463, 0.94307531289434765]),
        ([[60, 10], [60, 10]], [[0.27735009811261463, 0.94307531289434765],
                                [0.27735009811261463, 0.94307531289434765]])])