三角函數的一題計算...

👨🏻‍🏫 學術台數學

2008-03-26 9:19 pm

sin^2 15 + cos^2 15 + tan^2 15 + cot^2 15 + sec^2 15 + csc^2 15 = ?

回答 (2)

2008-03-26 9:41 pm

✔ 最佳答案

Please refer to the following solution:

圖片參考：http://hk.geocities.com/stevieg_1023/sincos.gif

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2008-03-26 9:36 pm

sin^2 15 + cos^2 15 + tan^2 15 + cot^2 15 + sec^2 15 + csc^2 15
=1+16+ 14
=31

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收錄日期: 2021-04-27 16:38:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080326000051KK01352

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