已知cos
,则sin
-cosα=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48ad5fd49271d28aee7df80b2ec43f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5168e3002642f43700c70af6a019aa4e.png)
A.±![]() | B.-![]() | C.![]() | D.±![]() |
2020高三·全国·专题练习 查看更多[1]
(已下线)专题4.2 简单的三角恒等变换-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破
更新时间:2020-08-29 17:58:27
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】已知函数
图象相邻两条对称轴间的距离为
,且对任意实数
,都有
.将函数
图象向左平移
个单位长度,得到函数
的图象,则关于函数
描述不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59054eb1d12ed5cd67b478989d7a6f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813ad54e223bc8ef3e0fbeef1b908b83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d02059613da3797ae406925b6ee5b3c.png)
A.最小正周期是![]() | B.最大值是![]() |
C.函数在![]() | D.图象关于直线![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】在
中,内角
、
、
对应边分别为
、
、
,已知
,且角
的平分线
交
于点
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b9815d8ba980baa1bdeb6f8c51a9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869fd81f0a12749f5e6fb856d29154a8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐2】下列关于函数
及其图象的说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8416265c5aa38e603bc319ad078b78.png)
A.![]() |
B.最小正周期为![]() |
C.函数![]() ![]() |
D.函数![]() ![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐1】已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb2e68f4a986299683bb186adf2547f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc4b5a267d637b8f9781e618f186855.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a811d75917b35384365afefe56241f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0a84501ff581868eb6b8dde66c2587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62e8abc3f127a2a085cf7c8d2a08c73.png)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次