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1 . 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
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623次组卷
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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)