2021/01/13: 昨天看到你在回答區問的, 我就補充了. (1/2)tan(θ)(1+tan^2(θ/2))/(tan(θ)+tan(θ/2)) = (1/2)tan(θ)sec^2(θ/2)/(tan(θ)+tan(θ/2)) = (1/2)(1/cos^2(θ/2))/(1+tan(θ/2)/tan(θ)) = (1/2)/(cos^2(θ/2)+cos^2(θ/2)tan(θ/2)/tan(θ)) 請再看看還有哪裡寫得不夠清楚. ============================= 作 線段...
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I like Chinese New Year better than dragon boat festival or Christmas, because I show respect for tradition, especially in Chinese Cultural Matters. Thanks for the encouragement.
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No. Setting aside most issues, before Pu-239 can be produced for GBP 300/kg, there are tons of investments have to be made before that can happen. Also - even successfully produced, it does not mean it...
分類：社會及文化 > 其他 - 社會及文化 2020年07月11日
