點解sin x/cosx/tanx計出來系無理數??
仲有cot sec csc 點解計數機冇得禁??
收錄日期: 2021-04-11 16:01:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091215000051KK01736