求高人解答下列三角恆等式
tan(\theta)sin(\theta) tan(\theta)-sin(\theta)
-------------------------------- 三 -------------------------------
tan(\theta)+sin(\theta) tan(\theta)sin(\theta)
收錄日期: 2021-04-21 22:20:55
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110329000051KK01328