解题方法
1 . 在平面直角坐标系中,设角
的终边上任意一点
的坐标是
,它与原点的距离是
,规定:比值
叫做
的正余混弦,记作
.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447f989d11d8ea5a1ced8dfb6cc1997e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf62a203e40968f6e64a74baf16c5a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808c2dc5162f4281753cddf5adfad7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956621e324b7e7edc3f34c99379da2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知
那么
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b21228273e632e8ef7974a44b838287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951978553810e7c65add6ad8df0725f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f08c0c935e3910364c5ba5cbf9b7cde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2020-01-15更新
|
693次组卷
|
4卷引用:河北省唐山市2019-2020学年高三上学期期末数学理科试题
河北省唐山市2019-2020学年高三上学期期末数学理科试题(已下线)专题01 三角函数的图象与性质-备战2021届高考数学(理)二轮复习题型专练?(通用版)山西省怀仁市2021-2022学年高一上学期期末数学试题河北省唐山市2019-2020学年高三上学期期末数学文科试题
名校
4 . 已知
,
是关于
的方程
的两个实根,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0115cd1e57c2758f383d0bbaec6e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97524d8c223c77c9deaee4bd718a95a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9352e9333e6ef83b277ecc26b1c5efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089e97c7691847de6a0d61dce947a395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0115cd1e57c2758f383d0bbaec6e6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-01-19更新
|
1221次组卷
|
5卷引用:黑龙江省大庆中学2017-2018学年高一上学期期末考试数学试题