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最大的正週期明顯是π.最大值的話更簡單,三角函數的值域是-1到+1,所以最大值是2+1=3. 其次是此時的值,也就是三角函數等於1的時候,(2x+π/3)=90°,那就是15°了.不知道有沒有看錯.這些基礎的三角函數題很簡單的,你看下定義和圖,理解下的話自己做做不會超過十秒.
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