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# graphs of trig fx

### study stack day 2

Term | Definition |
---|---|

unit circle | a unit circle is a circle with a radius of one. |

reference angle | The reference angle is the smallest angle between the terminal side and the x-axis. |

trig values | It is these ratios that the trigonometric functions express. To define the trigonometric functions for the angle A, start with any right triangle that contains the angle A. |

special acute angles | Angles smaller than a right angle (less than 90°) are called acute angles ("acute" meaning "sharp"). |

trig tables | In mathematics, tables of trigonometric functions are useful in a number of areas. |

trig functions | functions of an angle |

domain | All the values that go into a function The output values are called the range |

range | The difference between the lowest and highest values. |

amplitude , period , wavelength of trig waves | frequency is the number of waves per unit time. Period is the reciprocal of that - the duration of a single wave. Amplitude is the magnitude of the wave - how high it goes on the y axis. Wavelength is basically the same thing as period - |

graphs of inverse | |

trig transformation |