請問~
sin2x / 2ncosx =?
sin cos
2010-10-16 5:27 am
回答 (2)
2010-10-16 5:56 am
✔ 最佳答案
sin2x / 2ncosx= 2sinxcosx / 2ncosx =sinx/n=>分子分母消去n=>six
話說我記得沒錯這ˋ題是整人題目吧?
2010-10-17 7:10 am
sin2x=2sinxcosx
sin2x / 2ncosx
=(2sinxcosx)/(2ncosx)
=(sinx)/n
sin2x / 2ncosx
=(2sinxcosx)/(2ncosx)
=(sinx)/n
收錄日期: 2021-04-27 12:33:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101015000010KK06774