题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160031-63824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160031-95995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160032-80488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160031-95995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160032-64941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160031-95995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160032-75401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160032-61324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-71843.png)
答案
解析
函数f(x)=4sin(2x+
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-63263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-30150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-39008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
曲线f(x)的对称轴必经过图象的最高点或最低点,且与y轴平行,而x=-
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
(-
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822160033-18185.png)
故答案为:②③
核心考点
试题【关于函数有下列命题,① 图象关于直线对称 ②的表达式可改写为③的图象关于点对称 ④由必是的整数倍。其中正确命题的序号是 。】;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
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155955-66257.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155928-12151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155928-30578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155928-99618.png)
在直角坐标系中,已知
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155844-98859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155845-62129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155845-82748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155845-92998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155845-20852.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155845-34511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155846-32369.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155846-97766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155846-46121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155846-93311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155840-47415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155840-64538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155840-15279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155841-63019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822155815-13622.png)
(1)求f(x)的单调递增区间;
(2)在△ABC中,角A、B、C的对边分别是a、b、c满足(2a-c)cosB=bcosC,求函f(A)的值域.
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