若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e888ea14da893971e13858945bf0cd.png)
_____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d2963e1d16f01ed9868fa258fbad30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e888ea14da893971e13858945bf0cd.png)
17-18高一下·上海普陀·期中 查看更多[2]
更新时间:2020-01-05 22:42:00
|
【知识点】 已知正(余)弦求余(正)弦解读
相似题推荐
填空题-单空题
|
容易
(0.94)
解题方法
【推荐1】若
,
是第二象限角,则
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969b106918cf44777d177a0538da8cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
您最近一年使用:0次
填空题-单空题
|
容易
(0.94)
名校
解题方法
【推荐2】已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4daee66145c8933cc6bdde06dd02ba12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a3fd3a067dce1354bc941df061508a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
您最近一年使用:0次