作者查詢 / zjes40604
作者 zjes40604 在 PTT [ Math ] 看板的留言(推文), 共38則
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15F推: 推薦3b1b的矩陣系列影片 做的真的很不錯08/05 19:10
16F→: 如果不介意的話 b站有中文翻譯08/05 19:11
1F推: 反函數圖像不是旋轉90度 是對y=x做鏡射08/01 16:09
2F推: 而且要求arcsin的泰勒展開 直接用算的應該比較快08/01 16:12
3F→: arcsin的微分是(1-x^2)^(-1/2) 把這個式子展開後08/01 16:14
4F→: 再積分就行了08/01 16:14
1F推: 問題一跟三是差不多的。06/25 14:03
2F→: 假設這組正交基底只在xy平面上由正x軸向正y軸方向06/25 14:03
3F→: 旋轉Θ,則[1,0][0,1]變成[cosΘ,0][0,-sinΘ],其06/25 14:03
4F→: 餘不變即可。高維也是如此,看你要旋轉什麼方向再06/25 14:03
5F→: 去調整基向量,剩下的就不變06/25 14:03
6F推: 不好意思上面變換打錯了QQ.06/25 14:12
2F推: 只要任一原始向量與平面法向量平行就會只投影成一01/27 14:44
3F→: 個點了01/27 14:44
2F推: sin 0跟sin n pi都是001/02 21:20
6F推: 應該是要插值去擬合吧 但沒有其他條件的話會是無07/27 13:38
7F→: 限多解07/27 13:38
1F推: 這樣頂多算是說明 真的要證明還是要用戴德金分割06/28 09:52
2F→: 或是柯西序列06/28 09:52
11F推: 哭阿反串仔= =06/28 22:20