1 . 如图,在平面直角坐标系
中,以
轴为始边分别作角
,
,其终边分别与单位圆交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/4c8c3063-1a5e-4629-9642-3313ab8ab9ff.png?resizew=166)
(1)证明:
;
(2)设
,
,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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/4c8c3063-1a5e-4629-9642-3313ab8ab9ff.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff8eb79da2ae1202feebf45ba5e795c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f02fede76ba43141bafdb8e40963235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d68cdb7adedb9367abd25689430d51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f407134cad46827104d6654d92db1198.png)
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2021-08-26更新
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2卷引用:江苏省淮安市楚州中学、淮阴师范学院附属中学、新马高级中学2021-2022学年高一下学期期中联考数学试题