若
,且
是第三象限角,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75083d2a3f62c22971c6ef543e237420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
更新时间:2021-02-06 08:10:54
|
【知识点】 已知正(余)弦求余(正)弦解读
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填空题-单空题
|
容易
(0.94)
解题方法
【推荐1】已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae75304062219d4e8df91047fe6e6fa6.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9258f713c0cda7879ae218a01f91a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89040554aa79926881b74fe954e4d08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae75304062219d4e8df91047fe6e6fa6.png)
您最近一年使用:0次
填空题-单空题
|
容易
(0.94)
名校
【推荐2】在平面直角坐标系
中,角
与角
均以
为始边,它们的终边关于
轴对称.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634aa65493615fbb40f1352a88c5aa3.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63bd70e4cd466b1cd4c46331c81ecb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634aa65493615fbb40f1352a88c5aa3.png)
您最近一年使用:0次