点
是单位圆上的两点,
点分别在第一、二象限,点
是圆与
轴正半轴的交点,
是正三角形,若点
的坐标为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5924621252130af214d5ad3d84359559.png)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfd8da8cf8cfacb41ba262bfe0d77cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5924621252130af214d5ad3d84359559.png)
11-12高三上·山东潍坊·阶段练习 查看更多[1]
(已下线)2012届山东省潍坊市三县高三12月联考理科数学试卷
更新时间:2016-12-01 11:06:33
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解题方法
【推荐1】如图,点
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的终边与单位圆的交点,
逆时针旋转
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逆时针旋转
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【推荐1】在平面直角坐标系中,角
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轴对称,若
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【推荐2】已知锐角
的顶点与坐标原点重合,始边与
轴正方向重合,终边与单位圆分别交于
、
两点,若
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两点的横坐标分别为
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中,
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、
分别为三个内角
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,且
,则实数
的值是______ .
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