Trigonometry Reduction Formulas

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sin -x = ? | sin -x = -sin x | |

cos -x = ? | cos -x = cos x | |

csc -x = ? | csc -x = -csc x | |

tan -x = ? | tan -x = -tan x | |

sec -x = ? | sec -x = sec x | |

cot -x = ? | cot -x = -cot x |

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