3b) 2 cot x = tan x +1
3g) cos x + sec x = 2
* show full steps, can u explain it and tell me the skills in doing??
更新1:
the ans for the first one is wrong it should be 45, 225, 116.6 , 251.6
the ans for the first one is wrong it should be 45, 225, 116.6 , 251.6
收錄日期: 2021-04-23 20:46:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100919000051KK01545