def test_cos(trig_cls, trig_var):
f1 = AD.cos(trig_cls)
f2 = AD.cos(trig_var)
assert f1.func_val == np.cos(np.pi / 4)
assert f1.partial_dict['x1'] == -np.sin(np.pi / 4)
assert f2 == np.cos(np.pi / 4)
def test_trig(ar_pi):
assert [AD.sin(ar_pi)[0].func_val,
np.round(AD.sin(ar_pi)[1].func_val,
7)] == [1.0, np.round(0.7071067811865476, 7)]
assert np.round(AD.sin(ar_pi)[0].partial_dict['p_0'],
7) == np.round(6.123233995736766e-17, 7)
assert [
np.round(AD.cos(ar_pi)[0].func_val, 7),
np.round(AD.cos(ar_pi)[1].func_val, 7)
] == [np.round(6.123233995736766e-17, 7),
np.round(0.7071067811865476, 7)]
assert AD.cos(ar_pi)[0].partial_dict['p_0'] == -1.0
assert np.round(AD.tan(ar_pi)[1].func_val,
7) == np.round(0.9999999999999999, 7)
assert np.round(AD.tan(ar_pi)[1].partial_dict['p_1'],
7) == np.round(1.9999999999999996, 7)