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单词 cosine
释义 cosine
 /koh"suyn/,  n.  
  1.  Trigonom.  
   a. (in a right triangle) the ratio of the side adjacent to a given angle to the hypotenuse.
   b. the sine of the complement of a given angle or arc. Abbr.: cos
  2.  Math.   (of a real or complex number x) the function cos x defined by the infinite series 1 - (x2/2!) + (x4/4!) - + ... , where ! denotes factorial. Abbr.: cos Cf. sine (def. 3), factorial (def. 1).
 [1625-35; < NL cosinus. See CO-, SINE1]
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更新时间:2025/1/22 19:58:12