更新1:
(sinx-cosx+1)/(sinx+cosx-1) = (sinx+1)/cosx
Pleaseeeee help! Prove that: sinx-cosx+1/sinx+cosx-1 = sinx+1/cosx?
回答 (2)
2020-05-08 2:12 pm
Need the placement of parens to understand the question
收錄日期: 2021-05-01 22:41:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200508060954AAO0BR5