老師算錯了？！（挑戰題答案更正在資訊欄）三角函數角度轉換問題就靠著三招｜#數學3乘3 ｜曉戴數學｜高中三角函數
Synopsis
挑戰題中畫直角三角形的地方高應該是√（1-k ² ) 所以答案會是-√（1-k ² ) 影片中誤寫為1+k ² 了！ 遇到角度轉換問題可以先看看能 ...
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