化簡 cos θ/1+sinθ 1-sinθ/cosθ
不用恆等式,
詳盡答案
中三maths 中文
2007-02-08 2:30 am
回答 (2)
2007-02-08 5:07 am
✔ 最佳答案
(cos θ/1+sinθ)- (1-sinθ/cosθ) ....cos θ..........1-sinθ
=------------ - ----------------------
...1+sinθ..........cosθ
....cos^2 θ-1+sin^2 θ
=-----------------------------
....(1+sinθ)cosθ
.....1-1
=-----------------------------
....(1+sinθ)cosθ
.....0
=-----------------------------
....(1+sinθ)cosθ
=0
2007-02-08 2:34 am
cos θ/1+sinθ 1-sinθ/cosθ
= cos ( θ/1+sinθ 1-sinθ/cosθ)
= cos ( θ/1+sinθ 1-sinθ/cosθ)
收錄日期: 2021-04-13 16:39:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070207000051KK02663