21-22高一·全国·课前预习
解题方法
1 . 已知
,
,其中
都是锐角.求:
(1)
的值;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b291445e61f53061200d5d0d31f678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c702d255158e9b4429cd6aab850f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b4f4cd0b9c4cfed756bc8d58c9caf1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
您最近一年使用:0次
解题方法
2 . 已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff8e8f399db20c51e878b2b4b134793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a02f2f211664e50c7250355e83aae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802fde4648bad801a26b519b9dbdc85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
您最近一年使用:0次
2021-03-25更新
|
549次组卷
|
4卷引用:5.5 三角恒等变换-2021-2022学年高一数学教材同步精品学案(人教A版2019必修第一册)
名校
3 . 如图,在平面直角坐标系
中,以
轴为始边作两个锐角
,它们的终边分别与单位圆相交于
两点,已知
的横坐标分别为
,
.求
的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69d166677557cadb3da32b4a7e152e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3c1424841f905de42b18326f9acfa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/fcf0ed46-4daa-4732-a6f2-b645fe5864c6.png?resizew=147)
您最近一年使用:0次
2019-08-21更新
|
623次组卷
|
2卷引用:第10课时 课前 两角和、差的余弦、正弦和正切公式(2)