# Cos140

Input |
---|

cos(140°) |

Decimal approximation |

-0.76604444311897803520239265055541667393583245708039524585… |

Reference triangle for angle 140° |

width | cos(140 °) = -cos(40 °)~~-0.766044 height | sin(40 °)~~0.642788 |

Alternate form |

-cos((2 pi)/9) |

Continued fraction |

– [0; 1, 3, 3, 1, 1, 1, 4, 1, 1, 3, 3, 23, 1, 1, 5, 1, 4, 73, 111, 40, 1, 2, 15, 5, 1, 1, 2, …] |