1.tan3θ + sec3θ = 1
2.cotθ + cot(θ+π/4 ) = 3
3.sin^3θ - cos^3θ = sinθ - cosθ
不太明白 有空的,可以的,勞煩詳解
[A.Maths]三角通解問題(急....)
2009-03-13 6:13 am
回答 (2)
2009-03-13 8:32 am
為何第3題的sinθcosθ 直接就轉了做sin2θ ,不是2sinθcosθ才可以嗎?
2009-03-13 8:10 am
1.tan3θ + sec3θ = 1
圖片參考：http://g.imagehost.org/dl/5444094da878c0821be556aa902efffb/0278/ScreenHunter_01_Mar_14_00_20.gif
2009-03-13 00:23:01 補充：
3.
http://g.imagehost.org/dl/2a7adb7d35265aa1c4fc5d2fc7d0b9c5/0239/ScreenHunter_02_Mar_14_00_31.gif
圖片參考：http://g.imagehost.org/dl/5444094da878c0821be556aa902efffb/0278/ScreenHunter_01_Mar_14_00_20.gif
2009-03-13 00:23:01 補充：
3.
http://g.imagehost.org/dl/2a7adb7d35265aa1c4fc5d2fc7d0b9c5/0239/ScreenHunter_02_Mar_14_00_31.gif
收錄日期: 2021-04-23 20:36:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090312000051KK01867