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任意角（二）

任意角（二）. 一、复习回顾. 1 、角的分类 :. 2 、角的表示 :. 3). 象限角的表示 :. 二．应用举例. 解：. 例 4. 如果 是第三象限角 , 那么 2 角终边的位置如 何 ? 是哪个象限的角 ?. 解 :. y. o. x. 利用上述方法判断 , 可得如下结论 :. 2. 3. 4. 1. 4. 1. 2. 3. y. y. x. o. o. x.

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任意角（二）

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  1. 任意角（二）

  2. 一、复习回顾 1、角的分类: 2、角的表示:

  3. 3).象限角的表示:

  4. 二．应用举例

  5. 解：

  6. 例4.如果 是第三象限角,那么2 角终边的位置如 何? 是哪个象限的角? 解:

  7. y o x 利用上述方法判断,可得如下结论: 2 3 4 1 4 1 2 3

  8. y y x o o x

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