21-22高一·全国·课前预习
解题方法
1 . 在平面直角坐标系中,以x轴的非负半轴为角的始边,如果角
的终边分别与单位圆交于点
和
,那么
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6987f4fbd98cae91e33e72bd0c2e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802c85f4035559f800af53938aba532e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2a27159f8ae9a6134c3f3801386bdc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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