20 | | sage: RIF(cos(3/2)) |

21 | | 0.0707372016677030? |

22 | | sage: CC(cos(3/2)) |

23 | | 0.0707372016677029 |

24 | | sage: CIF(cos(3)) |

25 | | -0.98999249660044542? |

| 20 | sage: CIF(3/2).cos() |

| 21 | --------------------------------------------------------------------------- |

| 22 | AttributeError Traceback (most recent call last) |

| 23 | <ipython-input-13-96dae572cb36> in <module>() |

| 24 | ----> 1 CIF(Integer(3)/Integer(2)).cos() |

| 25 | |

| 26 | /usr/local/src/sage-config/local/lib/python2.7/site-packages/sage/structure/element.so in sage.structure.element.Element.__getattr__ (build/cythonized/sage/structure/element.c:4068)() |

| 27 | |

| 28 | /usr/local/src/sage-config/local/lib/python2.7/site-packages/sage/structure/misc.so in sage.structure.misc.getattr_from_other_class (build/cythonized/sage/structure/misc.c:1631)() |

| 29 | |

| 30 | AttributeError: 'sage.rings.complex_interval.ComplexIntervalFieldElement' object has no attribute 'cos' |