def test_ADmath_cscr():
f = ADmath.csc(5)
assert f == 1 / np.sin(5)
def test_ADmath_csc():
f = ADmath.csc(ADnum(5, der=1))
assert f.val == 1 / np.sin(5)
assert f.der == (-1 / np.tan(5)) * (1 / np.sin(5))
assert len(f.graph) == 1