题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210329-35328.gif)
(1)求解析式中
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210329-82716.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210329-86329.jpg)
(2)该图像可由
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-86594.gif)
再横向拉伸到原来的_______倍.纵向拉伸到原来的______倍得到.
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-14514.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-76076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-45218.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-43814.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-95597.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-14930.gif)
又由图象可知,当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-25147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-76792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-71301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210331-18196.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210332-59378.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-76076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210332-51314.gif)
∴A = 3,
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-14514.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-76076.gif)
(2)左.
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-45218.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210330-43814.gif)
核心考点
试题【函数的图象如下图所示.(1)求解析式中的值; (2)该图像可由的图像先向_____(填“左”或“右”)平移_______个单位,再横向拉伸到原来的_______】;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/20190822/20190822210143-24416.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210143-73408.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210143-45124.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210143-15962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210143-84783.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210144-91614.gif)
(Ⅱ)求当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210144-76443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210144-86428.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210125-81873.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210126-60565.gif)
(2)求使
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210126-39374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210051-62022.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210051-33123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-41200.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210051-33123.gif)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-23275.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-23275.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-57177.gif)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-27793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-23275.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-42587.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210052-23275.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210053-67018.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-76317.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-73925.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-73925.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-94156.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-87060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210034-47985.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210035-91599.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210035-62145.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205956-92744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205956-47679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205957-18944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205957-35393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205956-47679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205957-74881.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205957-19464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205957-97878.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822205958-12423.jpg)
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