题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015024-89552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015024-16523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015024-10920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015024-60710.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-10145.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-51281.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-44750.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-13967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-31105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-44750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-69183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-97406.png)
解析
试题分析:(1)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-21696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-72395.png)
(2)由(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-12920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-23332.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-29739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015028-97076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-72395.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015028-30177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-13967.png)
又当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015028-47779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015028-38439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-31105.png)
(2)由(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-12920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015027-23332.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015028-16837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015025-44750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-69183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015026-97406.png)
点评:解决该试题的关键是运用向量的数量积来表示三角函数式,并能利用三角函数的单调性来求解其区间的运用。
核心考点
试题【(10分)已知向量,其中,函数的最小正周期为,最大值为3.(1)求和常数的值;(2)求函数的单调递增区间.】;主要考察你对平面向量的基本定理及坐标表示等知识点的理解。[详细]
举一反三
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015008-62021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015009-19526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015009-87802.png)
(Ⅰ) 求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015009-82385.png)
(Ⅱ) 已知
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015009-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015010-88858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015010-53112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015010-46921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015010-64088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015011-93166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015011-24943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015000-91132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015001-75652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015001-94475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015001-18198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104015001-93719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014952-79261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014952-63813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014952-40046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014952-53614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014953-54498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014953-60110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014953-63978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014942-59674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014943-82608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014943-77884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014943-93225.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014943-77090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014944-64861.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014944-61497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104014944-78570.png)
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