Read Edit View history 偶函数 ǒuhánshù even function Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 偶函数/偶函數 · ǒuhánshù · even function 2026/03/04 偶函数 / 偶函數 ǒuhánshù even function even function (math.) 余弦函数是一个典型的偶函数。 created sense Mar 4, 2026, 02:25 AM