prove(2cos2θ+2cosθ+1)sin(θ/2)=sin(5θ/2)
then prove(4cos2次θ+2cosθ-1)sin(θ/2)=sin(5θ/2)
f4.trigo,,急!!!!
2007-02-28 5:53 am
回答 (1)
2007-02-28 7:21 am
✔ 最佳答案
Please find the answer below:圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Crazytrigo31.jpg
參考: My Maths knowledge
收錄日期: 2021-04-23 21:09:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070227000051KK04758