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BNC: 29985 COCA: 38566

cosine

noun
/ˈkəʊsaɪn/
/ˈkəʊsaɪn/
(abbreviation cos)
(mathematics数学)
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  1. the ratio of the length of the side next to an acute angle in a right-angled triangle to the length of the longest side (= the hypotenuse)余弦 compare sine, tangentTopics Maths and measurementc2

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