f4...math,,help............

無名

2007-04-16 1:41 am

求通解...

tan(30°+x) tan(30°-x) = 1-2cos2x

步驟,,thxxx

回答 (1)

馬吉.斯

2007-04-16 1:51 am

✔ 最佳答案

Please refer to http://hk.knowledge.yahoo.com/question/?qid=7007041502704
Thank you.

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