[高中數學 三角函數(三角比)] #7 (講解) 秒殺廣義三角函數計算
Synopsis
畫2張圖秒殺廣義三角函數計算第1張: 標出廣義角所在象限，再判定對sin, cos, tan來說誰是正，其餘是負第2張: 用參考角相同， ...
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