*TangentFn* | *documentation* (*TangentFn* ?DEGREE) is the tangent of the PlaneAngleMeasure ?DEGREE. The tangent of ?DEGREE is the ratio of the side opposite ?DEGREE to the side next to ?DEGREE in a right-angled triangle | |

**has axiom** (*equal* (*TangentFn* ?DEGREE) (*DivisionFn* (*SineFn* ?DEGREE) (*CosineFn* ?DEGREE)))
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**has domain1** PlaneAngleMeasure | |

**has ***range* RealNumber | |

**is an ***instance* of UnaryFunction | |

BinaryRelation | **is first ***domain* of *DomainFn* | |

**is first ***domain* of *equivalenceRelationOn* | |

**is first ***domain* of *inverse* | |

**is first ***domain* of *irreflexiveOn* | |

**is first ***domain* of *partialOrderingOn* | |

**is first ***domain* of *RangeFn* | |

**is first ***domain* of *reflexiveOn* | |

**is first ***domain* of *totalOrderingOn* | |

**is first ***domain* of *trichotomizingOn* | |

**is second ***domain* of *inverse* | |

Function | **is first ***domain* of *AssignmentFn* | |

**is first ***domain* of *closedOn* | |

**is first ***domain* of *range* | |

**is first ***domain* of *rangeSubclass* | |

Class | **is third ***domain* of *domain* | |

**is third ***domain* of *domainSubclass* | |

Abstract | **is ***disjoint* from Physical | |