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# Trig Identities 14

### Trig Identities Ch 14

Question | Answer |
---|---|

sin^2x*cos^2x | 1 |

tan^2x+1 | sec^2x |

cot^2x+1 | csc^2x |

sin(x+2PIn) | sinx |

csc(x+2PIn | cscx |

cos(x+2PIn) | cosx |

sec(x+2PIn) | secx |

tan(x+PIn) | tanx |

cot(x+PIn) | cotx |

sin(2x) | 2sinxcosx |

cos(2x) | cos^2x-sin^2x 2Cos^2x-1 1-2sin^2x |

tan(2x) | 2tanx/1-tan^2x |

sin^2x | 1/2(1-cos(2x)) |

cos^2x | 1/2(1+cos(2x)) |

tan^2x | 1-cos(2x)/1+cos(2x) |

sin(A+-B) | sinAcosB+-cosAsinB |

cos(A+-B) | cosAcosB-+sinAsinB |

tan(A+-B) | tanA+-tanB/1-+tanAtanB |

sin(Pi/2 -x) | cosx |

csc(Pi/2 -x) | secx |

tan(Pi/2 -x) | cotx |

cos(Pi/2 -x) | sinx |

sec(Pi/2 -x) | cscx |

cot(Pi/2 -x) | tanx |

sin x/2 | +-sqrt(1-cosx/2) |

cos x/2 | +-sqrt(1+cosx/2) |

tan x/2 | 1-cosx/sinx sinx/1+cosx |

Created by:
Monkeyboy1518