题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142023-80161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142023-13406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142023-93323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-66721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142023-80161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-34166.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-86337.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-86337.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-63885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-95320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-86337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-36358.png)
解析
试题分析:(1)先利用正弦定理将
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-20000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-95912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-54208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-54208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-63885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-96730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-96730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
试题解析:(1)由正弦定理得
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-76933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-71463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-56829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142026-30017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142027-54486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142027-70424.png)
其中
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142027-16424.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142024-95320.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142027-37475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142027-33458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142028-70799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142028-21052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822142025-36358.png)
核心考点
试题【在中,已知内角,边.设内角,的面积为.(1)求函数的解析式和定义域;(2)求函数的值域.】;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/20190822/20190822141902-40317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141902-49992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141903-54769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141903-93389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141903-90518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-98540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-36497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-16897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-72542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-65261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141904-47842.jpg)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141905-56462.png)
(2)若在湖泊内修建如图所示的矩形水上乐园
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141905-69381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141905-40398.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141902-49992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141844-49259.png)
(I)当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141845-67271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141845-98987.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141845-53834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141845-50319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141845-66718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141846-36024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141846-28485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141846-75865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141846-33877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141814-73451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141814-74165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141814-37516.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-39671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-61725.png)
(Ⅱ)在锐角
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-20035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-72050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-40679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141816-89036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-20035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141816-48402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141815-20035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141739-51317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141740-94451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141740-21525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141740-93009.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141741-32581.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141741-79586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141741-93695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141741-34363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141742-54851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141742-55918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141742-18661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141640-73282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141641-76369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141641-94842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141641-69923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822141641-14462.png)
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