已知角
的顶点为坐标原点,始边与
轴的非负半轴重合,终边上有点
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ea0c2e6bfbb8de942b51af7da01cdd.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329d4a942aa19342a1e658a3fe659c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeea04ed9fce6ab6c7e3cbe6cdb19866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ea0c2e6bfbb8de942b51af7da01cdd.png)
19-20高三上·北京·期中 查看更多[2]
更新时间:2018-11-23 13:25:09
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【推荐1】在平面直角坐标系
中,角
是以
为顶点,
轴为始边,若角
的终边过点
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01c3b06212b20c3348aec05328f9c9c.png)
_________ .
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【推荐2】矩形ABCD中,
,
,AD的中点为M,折叠矩形使得点A落在边CD上,则点M到折痕的距离的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
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【推荐2】锐角
中,内角A,B,C所对的边分别为a,b,c,
,且
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【推荐3】已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
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