题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210347-29126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210347-72706.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210347-84070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210347-83203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-53057.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-94271.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-59971.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-66497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210347-83203.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-67855.gif)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-82079.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-85087.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-19243.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-53057.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-94271.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-86329.gif)
(Ⅱ)由正弦定理得
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-42277.gif)
且
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210348-66497.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-82079.gif)
再由
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210350-71029.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822210349-85087.gif)
核心考点
试题【在中,为锐角,角所对的边分别为,且,。(Ⅰ)求的值;(Ⅱ)若,求的值。】;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/20190822/20190822210329-35328.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.
![](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)
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