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# Right Tri<'s & Trig

### Chapter 7 Vocabulary

Word | Definition |
---|---|

pythagorean triple | a set of three positive integers a, b, and c that satisfy the equation c(2)= a(2)+ b(2) |

trigonometric ratio | a ratio of the lengths of two sides in a triangle. |

tanget | a trigonometric ratio. for a right triangle ABC, the tan. of the acute angle A is TanA= length of leg opp. <A/ length of leg adjacent <A |

sine | a trigonometric ratio. for a right triangle ABC, the sin. of the acute angle A is SinA= length of leg opp. <A/ length of hyp. |

cosine | a trigonometric ratio. for a right triangle ABC, the cos. of the acute angle A is CosA= length of leg adjacent <A/ length of hyp. |

angle of elevation | when you look up at an object, the angle that your line of sight makes with a line drawn horizontally |

angle of depression | when you look down at an object, the angle that your line of sight makes with a line drawn horizontally |

solve a right triangle | to find the measures of all of the sides and angles of a right triangle |

inverse tangent | an inverse trig. ratio. abbreviated as tan-1. for an acute angle A if tanA=y, then tan-1y=m<A |

inverse sine | an inverse trig. ratio. abbreviated as sine-1. for an acute angle A if sinA=y, then sin-1y=m<A |

inverse cosine | an inverse trig. ratio. abbreviated as cos-1. for an acute angle A if cosA=y, then cos-1y=m<A |

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