题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082950-87885.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082950-70155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-13169.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-44550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-30075.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-32550.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-43319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082952-10848.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082952-23070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-44550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-30075.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-44550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-30075.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082952-63280.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082953-53152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082953-31763.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-43319.gif)
(Ⅱ)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082953-73688.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082953-89759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082954-96206.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082951-43319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082954-69015.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082954-12669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082954-28273.gif)
故所求函数的值域为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082952-10848.gif)
核心考点
试题【(本小题满分14分)已知角是的内角,向量,⊥.(Ⅰ)求角A的大小;(Ⅱ)求函数的值域.】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082941-28594.gif)
f(x)=
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082942-11589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082942-50774.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082942-95875.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082942-89735.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082935-23210.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082935-16692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082936-24738.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082936-52594.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082935-23210.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082936-52594.gif)
⑴求f(x)的最小正周期和单调增区间;
⑵如果三角形ABC中,满足f(A)=
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082936-16946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082930-45535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082930-80848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082931-80536.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082931-99783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082931-44396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082931-99783.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082924-19824.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082924-63745.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082924-31813.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082925-34479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082925-30700.gif)
Ⅰ.求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082911-73902.gif)
Ⅱ.设
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082911-87263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082912-44934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082912-70911.gif)
Ⅲ.若对于任意的实数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082912-28571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082912-57934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082912-32709.gif)
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