12-13高二上·甘肃武威·期中
1 . 在
中,若边长和内角满足
,则角
的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b733f34f62f393530e4428c45c8e8987.png)
![](https://img.xkw.com/dksih/QBM/2013/5/15/1571214996791296/1571215002140672/STEM/0dd7b6543d2a45c98745dd313cb591f1.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
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14-15高三上·湖北黄冈·期中
2 . 已知函数
的图象的一个对称中心是点
,则函数
=
的图象的一条对称轴是直线
![](https://img.xkw.com/dksih/QBM/2014/12/18/1571929035268096/1571929040609280/STEM/bd9ee6c719184902bfe0f5053add8eec.png)
![](https://img.xkw.com/dksih/QBM/2014/12/18/1571929035268096/1571929040609280/STEM/f4d65746a40e4006ab9ebe51777ff99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://img.xkw.com/dksih/QBM/2014/12/18/1571929035268096/1571929040609280/STEM/2004edee01524097b92bb2639cd3c24a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . (1)求值:![](https://img.xkw.com/dksih/QBM/2016/8/4/1572958544216064/1572958549770240/STEM/86f69019bde04e05ad320a1f85852103.png)
(2)已知
,求
的值.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572958544216064/1572958549770240/STEM/86f69019bde04e05ad320a1f85852103.png)
(2)已知
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572958544216064/1572958549770240/STEM/a462b7dae86240af89e54ce0721ccc2e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572958544216064/1572958549770240/STEM/1b6296f7556c4070b2e9caebbd30d2bd.png)
您最近一年使用:0次