Read Edit View history 正弦 zhèngxián sine Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 正弦 · zhèngxián · sine 2026/03/04 正弦 zhèngxián sine (math.) sine 我们需要计算这个角的正弦值。 created sense Mar 4, 2026, 02:25 AM