def check_arctanh():
x = create_input_for_trigonometric_ops(
[-1 / 4, -1 / 2, 0, 1 / 4, 1 / 2])
y = nd.arctanh(x)
# expected ouput for indices=(0, 1, -3, -2, -1) after applying arctanh()
expected_output = [
np.arctanh(-1 / 4),
np.arctanh(-1 / 2), 0,
np.arctanh(1 / 4),
np.arctanh(1 / 2)
]
assert_correctness_of_trigonometric_ops(y, expected_output)
def arctanh(x):
return nd.arctanh(x)
