csc q = 1/sin q |
sec q
= 1/cos q |
cot q = 1/tan q |

sin(-q)
= -sin q |
cos(-q)
= cos q |

csc (-q) = -csc
q |
sec(- q) = sec
q |

tan(-q ) = -tan
q |
cot(- q) =
-cot q |

sin^{2}
q + cos^{2}
q = 1 |
1 + tan^{2}
q = sec^{2}
q |
1 + cot^{2}
q = csc^{2}
q |

sin q = cos(90^{o}
- q ) |
cos q = sin(90^{o}
- q) |

tan q = cot(90^{o}
- q) |
cot q = tan(90^{o}
- q) |

sec q = csc(90^{o}
- q) |
csc q = sec(90^{o}
- q) |