If you are in trigonometry or pre-calculus, the below is something you want to memorize, write down, something! Here is a table with the “exact values” for the important angles we use:

Degrees | Radians | sin(x) |
cos(x) |
tan(x) |

0 (or 360) | 0 (or 2π) | 0 | 1 | 0 |

30 | π/6 | 1/2 | √(3)/2 | √(3)/3 |

45 | π/4 | √(2)/2 | √(2)/2 | 1 |

60 | π/3 | √(3)/2 | 1/2 | √(3) |

90 | π/2 | 1 | 0 | Undefined |

180 | π | 0 | -1 | 0 |

270 | 3π/2 | -1 | 0 | Undefined |

Remember: If you ever need to find **csc**, **sec**, or **cot** values, they are just reciprocals. **Csc** is the reciprocal of **sin**, **sec** is the reciprocal of **cos**, and **cot** is the reciprocal of **tan**.

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