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  1. 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...

    分類:科學及數學 > 數學 2021年01月13日

  2. Question: The figure shows 4 identical circles. If the perimeter of the shaded region ...

    分類:科學及數學 > 數學 2020年05月25日

  3. Question: In ΔABC as shown , C is a point on BD such that AC is an altitude...

    分類:科學及數學 > 數學 2020年11月08日

  4. so:-adv---so as to--->"so as to "---->used to do something , to show something, to judge something from what he said:- eg:- I am not so...

    分類:社會及文化 > 語言 2020年11月01日

  5. 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.

    分類:社會及文化 > 語言 2020年07月31日

  6. ... above is the thinking process. Then we proceed to show the work.] From (a), it is proved that ΔABC...

    分類:科學及數學 > 數學 2021年01月07日

  7. ... = 8 cm, BD = EC = 9 cm and ∠ABC = ∠ACB. (a) Show that ΔABE ≅ ΔACD. (b) It is ...

    分類:科學及數學 > 數學 2020年08月08日

  8. ....所以,我幫你改寫第一段如下: My below enclosed resume will show you that I have had diversified experiences in...

    分類:社會及文化 > 語言 2020年07月03日

  9. Ref. gravity formula:  If Mass same, New r is 1/3R. new g will be 1/(1/3R)^2 more or about x9 times more than original planet.

    分類:科學及數學 > 物理學 2020年05月19日

  10. 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...