Python cos Examples

Example #1

File: test_interval_functions.py Project: KonstantinTogoi/sympy

def test_cos():
    a = cos(interval(0, np.pi / 4))
    assert a.start == np.cos(np.pi / 4)
    assert a.end == 1

    a = cos(interval(-np.pi / 4, np.pi / 4))
    assert a.start == np.cos(-np.pi / 4)
    assert a.end == 1

    a = cos(interval(np.pi / 4, 3 * np.pi / 4))
    assert a.start == np.cos(3 * np.pi / 4)
    assert a.end == np.cos(np.pi / 4)

    a = cos(interval(3 * np.pi / 4, 5 * np.pi / 4))
    assert a.start == -1
    assert a.end == np.cos(3 * np.pi / 4)

    a = cos(interval(0, 3 * np.pi))
    assert a.start == -1
    assert a.end == 1

    a = cos(interval(- np.pi / 3, 5 * np.pi / 4))
    assert a.start == -1
    assert a.end == 1

    a = cos(interval(1, 2, is_valid=False))
    assert a.is_valid is False

Example #2

File: test_interval_functions.py Project: zabatistas/sympy

def test_cos():
    a = cos(interval(0, np.pi / 4))
    assert a.start == np.cos(np.pi / 4)
    assert a.end == 1

    a = cos(interval(-np.pi / 4, np.pi / 4))
    assert a.start == np.cos(-np.pi / 4)
    assert a.end == 1

    a = cos(interval(np.pi / 4, 3 * np.pi / 4))
    assert a.start == np.cos(3 * np.pi / 4)
    assert a.end == np.cos(np.pi / 4)

    a = cos(interval(3 * np.pi / 4, 5 * np.pi / 4))
    assert a.start == -1
    assert a.end == np.cos(3 * np.pi / 4)

    a = cos(interval(0, 3 * np.pi))
    assert a.start == -1
    assert a.end == 1

    a = cos(interval(-np.pi / 3, 5 * np.pi / 4))
    assert a.start == -1
    assert a.end == 1

    a = cos(interval(1, 2, is_valid=False))
    assert a.is_valid is False