Math question, help me
回答 (1)
2008-02-18 9:21 pm
✔ 最佳答案
(3sin(π/5^500))^2+ (3cos(π/5^500))^2=3^2[sin(π/5^500))^2+ cos(π/5^500)^2]
=9(1)
=9
[p.s. (sina)^2+(c0sa)^2=1]
收錄日期: 2021-04-25 17:29:58
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https://hk.answers.yahoo.com/question/index?qid=20080218000051KK01014