範例：使用極角

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範例：使用極角

1. 定義等長的兩個向量，分別描述 x 與 y 座標。

按一下以複製此運算式

按一下以複製此運算式

2. 使用 angle 與 atan2 函數取得對應的 x 與 y 座標角度。

按一下以複製此運算式

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按一下以複製此運算式

atan2 不是在 (0,0) 上定義。

按一下以複製此運算式

3. 使用 x 座標計算半徑向量，並繪製結果。

按一下以複製此運算式

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按一下以複製此運算式

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4. 使用 atan2 函數的結果計算半徑、將其繪製成圖，然後與上一個繪圖進行比較。

按一下以複製此運算式

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按一下以複製此運算式

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這兩個繪圖完全相同。