解题方法
1 . 如图,角
的顶点与平面直角坐标系
的原点重合,始边与
轴的非负半轴重合,终边与单位圆交于点
,若点
的坐标为
(其中
).
(1)求
的值;
(2)若将
绕原点
按逆时针方向旋转45°,得到角
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32d85f28562ac5bc372a904a55ffd64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b170470d02c85c1be9a3faff5eca0de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/936ba710-1c7e-4cf6-a58a-4035f5a488d8.png?resizew=162)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
(2)若将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6369cd1db768436809404b1f3c4132c0.png)
您最近一年使用:0次
解题方法
2 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cd68e2de888a40873c18375799d3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d45c243d18b3c631dc5d7c950b7abe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-02-15更新
|
524次组卷
|
2卷引用:云南省大理州宾川县第四完全中学2020-2021学年高一4月月考数学试题