sinθ/[cos(90-θ)]
=?
F.2 Trigonometric
2008-05-29 11:56 pm
回答 (1)
2008-05-30 12:03 am
✔ 最佳答案
sinθ/[cos(90-θ)]=sinθ/sinθ
=1
2008-05-29 16:04:33 補充：
θ cannot =0 or 180
收錄日期: 2021-04-23 20:22:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080529000051KK01229