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1 . 在平面直角坐标系
中,角
以
为始边,它的终边与单位圆交于第二象限内的点
.
(1)若
,求
的值;
(2)若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90688751e58655291204fab149e744e3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6644721146986b75312aa71bd467677c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc0bd9b373d1d5d819d0b3e2ec00398.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3efa007272f8028d7ad0acb80e45a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
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解题方法
2 . 若
为锐角,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a5b10738e1cf6c8921e3d2e0c51e34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
A.10° | B.20° | C.70° | D.80° |
您最近一年使用:0次
2024-03-03更新
|
883次组卷
|
4卷引用:内蒙古自治区锡林郭勒盟2023-2024学年高三下学期开学联考理科数学试题
名校
3 . 已知
,
,
,
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f102439ebd1efd422f04209ecec2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f65044c12d07e5f37b5e0e68d9f5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688d64a9a4050c695595a04578254537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0a8cb37f794d3ef9e9c633e6858bc2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次
2019-07-11更新
|
833次组卷
|
2卷引用:内蒙古阿拉善盟第一中学2021-2022学年高二上学期开学考试理科数学试题