题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-63753.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-22747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-50787.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-43578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-74202.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083405-43943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083405-77975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083405-18896.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083405-72508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083406-66680.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-43578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083406-44422.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083404-74202.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083406-43192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083406-63927.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083407-96184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083407-94362.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083407-14542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083407-55199.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083405-72508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083406-66680.gif)
给式求角问题可考虑先求出一种三角函数值,再精确估计角的范围再定角。
核心考点
试题【已知:向量,,函数,若且,求的值;】;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/20191104/20191104083353-29606.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083353-91184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083353-82246.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083354-83960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083354-48141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083354-75496.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083354-78252.gif)
A.最大值为8 | B.最大值为4 | C.最小值-4 | D.最小值为-8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-16718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-84184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-16718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-36432.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-84184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-16718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-84184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-97919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-16718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-84184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083346-65439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-16718.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-84184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083345-97919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083346-65439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083331-99673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083331-84372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083331-72287.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083332-38190.gif)
(1) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083332-89084.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083332-80378.gif)
(2) 当m﹥0时,求使不等式
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083332-19494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083320-66977.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083321-90366.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083321-48574.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083321-38816.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083321-67347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083321-11272.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083322-79619.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083322-37115.gif)
.已知平面向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-74386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-24638.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-72769.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-52753.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-50972.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-23111.gif)
(1)试求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-48842.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083312-26606.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083312-65650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104083311-72769.gif)
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