tanX=4
(2sinX - 3cosX)除以4cosX
點計呀???
計數.....
2007-05-14 4:59 am
回答 (1)
2007-05-14 5:04 am
✔ 最佳答案
(2sinX - 3cosX)/4cosX=sinX/2cosX-3cosX/4cosX
=tanX/2-3/4
=2-3/4
=5/4
參考: me
收錄日期: 2021-04-12 19:38:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070513000051KK04799