a-maths!!!!!

用戶7639

2007-12-11 2:49 am

化簡下列各式
(cos³θ-cos3θ)/cosθ + (sin³θ+sin3θ)/sinθ

回答 (1)

Gabriella Montez

2007-12-11 3:05 am

✔ 最佳答案

As follows:

圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths025.jpg?t=1197284700

參考: My Maths Knowledge

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