中3 三角比 MATHS!!!HELP!!!

2009-06-15 8:24 am
1) 1/1-cosθ - 1+cosθ/sin^2θ

2) (1- 1/cosθ) (1/cosθ + 1)

唔該要步驟~~!!急!!10點,thanks~~!!

回答 (1)

2009-06-15 8:39 am
✔ 最佳答案
As follows:

圖片參考:http://i707.photobucket.com/albums/ww74/stevieg90/13-6.gif


2009-06-17 19:00:02 補充:
1)
=0


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