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单词 cosine
释义 co·sineBrE /ˈkəʊsaɪn/NAmE /ˈkoʊsaɪn/ noun (abbreviation cos) (mathematics 数学) 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, tangent (2)
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