平面四边形ABCD中,若
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc422f4e3413fe1f5e2fde0410d9c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45de082dfb670492300702f9aa422e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dfe52fcfb54ad86989bfc65bedc443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d1cb2b30140743d4bbc880656a81a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-03-16 12:29:30
|
【知识点】 利用定义求某角的三角函数值解读
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】在平面直角坐标系
中,已知角
的始边是
轴的非负半轴,终边经过点
,则
( )
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a42451bdbef6c82dbaf8e06f0614794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知角
的终边绕原点
逆时针旋转
后,得到角
的终边,角
的终边过点
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c2cc78d48d59f0b121f2afdc192e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f73e9fe4509a05f4f3b3ab6ec5073b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次