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cosine noun

  /ˈkoʊ.saɪn/ , /ˈkəʉ.sɑɪn/ , /ˈkəʊ.saɪn/
  • (trigonometry) In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos
 co-seno
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