题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182654-67299.gif)
A.一或三 ![]() | B.二或四 | C.三或四 | D.一或四 |
答案
解析
核心考点
试题【 若角A是第二象限角,则角是第几象限角A.一或三 B.二或四 C.三或四 D.一或四】;主要考察你对任意角三角函数的概念等知识点的理解。[详细]
举一反三
(本小题满分14分)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182531-50589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182531-20949.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182531-61693.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182531-45862.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182531-80700.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182532-24855.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182532-90210.gif)
(2)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182532-47442.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182532-77498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-71994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-30413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-16996.gif)
①直线
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-71994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-16996.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-73154.gif)
②对任意
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-80764.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182540-65584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-71994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182539-16996.gif)
试证明:直线
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182540-85839.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182540-22449.gif)
(3)记
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182540-70879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182540-58192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182541-97850.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182541-53292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182543-80350.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182544-98507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-14423.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-69025.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-38164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-36881.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-18505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182548-36881.gif)
(1)求f的值;
(2)将函数y=f(x)的图象向右平移个单位后,再将得到的图象上各点的横坐标伸长到原来的4倍,纵坐标不变,得到函数y=g(x)的图象,求g(x)的解析式及其单调递减区间
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182403-84016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182403-47659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182404-27980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182404-58660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182404-61661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182404-73916.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182243-71431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182244-30782.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182124-95112.png)
(A )
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182124-84471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182124-55004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182124-40573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822182125-53799.png)
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