1 . 有四个关于三角函数的命题:
:
x
R,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db93f5ae179d970e478cb43b8030291c.png)
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baac50f844ebc073cbd706eac150c4e6.png)
=
:
x,y
R,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e40d565a6db5be4184292ec6597367.png)
:
+2kπ (k
Z)
:
x![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5039751960da8655b69dc15e2fb6ee2.png)
其中真命题的是 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c3726fe0b0698826dc623f269e179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db93f5ae179d970e478cb43b8030291c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1020afcfd8b7de38dfd825373b86bdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baac50f844ebc073cbd706eac150c4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1020afcfd8b7de38dfd825373b86bdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6565011c3dba4e85492866f3978ae326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c3726fe0b0698826dc623f269e179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e40d565a6db5be4184292ec6597367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74734034b6c699f0de0c656b979e18a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833e2bf39c550dd4840d7dcdc1ed3a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5039751960da8655b69dc15e2fb6ee2.png)
其中真命题的是 ( )
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2022-03-16更新
|
256次组卷
|
2卷引用:西藏林芝市、日喀则市2021届高三下学期第二次联考数学(理)试题
2 . 写出下列命题的否定,并判断其真假.
三角形的内角和等于
;
(2)
美国总统奥巴马是
年度诺贝尔和平奖获得者
(3)
所有的空间四边形的对角线所在的两条直线都是异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8b2cc2b7e5cca34adbc26c7fe00bfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e1dcdc9d50fe147e3924ce30bba519.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ea04085288dd81b2e2d723247e3726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1ba8bab1cdcc6a8e49e4caa22ad22c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ea04085288dd81b2e2d723247e3726.png)
您最近一年使用:0次