若
,且
是第三象限的角,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a26d7cf18465d813a2dde57373f7bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
更新时间:2023-02-02 11:37:00
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【知识点】 已知弦(切)求切(弦)解读
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解题方法
【推荐1】已知
,且
在第三象限,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d292bf76cce13b6557add93f6661329.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237b1a6f3e6ee0ef92b4aef7bffe58ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d292bf76cce13b6557add93f6661329.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
【推荐2】在△ABC中,角A、B、C的对边分别为
、
、
,且
,则角B的大小是 _________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43419b43647c7db764de1f50180ebeb6.png)
您最近一年使用:0次