answer=開方3 +開方6
我唔知個步驟係咩!!幫下我~~~~
更新1:
點解1/tan30會變左tan(90-60) 跟住又會變左tan60既?
點解1/tan30會變左tan(90-60) 跟住又會變左tan60既?
收錄日期: 2021-04-25 17:00:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090419000051KK00786