解题方法
1 . 如图,
是坐标原点,
,
是单位圆上的两点,且分别在第一和第三象限;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/8d287f9e-1872-468a-b29c-dd57ae58883e.png?resizew=150)
(1)证明:
;
(提示:设
为
的终边,
为
的终边,则
,
两点的坐标可表示为
和
)
(2)求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/8d287f9e-1872-468a-b29c-dd57ae58883e.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff8eb79da2ae1202feebf45ba5e795c.png)
(提示:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faa86fd7ec41cacc3ff1859a9b1fc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05658511cc8728f4a77fbed890a637a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc5f2d9131427515d94aa48abc44d51.png)
您最近一年使用:0次
2023-04-29更新
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2卷引用:湖北省襄阳市第三中学2022-2023学年高一下学期5月月考数学试题
2 . 下列论述中,正确的有( )
A.正切函数的定义域为![]() |
B.若![]() ![]() |
C.第一象限的角一定是锐角 |
D.圆心角为![]() ![]() |
您最近一年使用:0次
2023-04-06更新
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588次组卷
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4卷引用:湖北省襄阳市第三中学2022-2023学年高一下学期5月月考数学试题