题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040337-41905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040337-35622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-43591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-68282.png)
(1) 求
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-85165.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-81678.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-45235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-38287.png)
(2)递增区间为
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-66861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-55750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-55430.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-91413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-68282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-43591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-27174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-45235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-27367.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-79635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-38287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-61246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-61246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-61246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-30936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-22072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-24909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040342-41808.png)
(1)图象变化后得
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-91413.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-27174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040338-45235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-27367.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040340-79635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-38287.png)
(2)由(1)得
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-61246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040342-63925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040342-19323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-30936.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-22072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040341-24909.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040342-41877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040342-85774.png)
递增区间为
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-66861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-55750.png)
递减区间为
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040339-55430.png)
核心考点
试题【把函数的图像上每一点的横坐标伸长到原来的2倍,纵坐标不变,然后再向左平移个单位后得到一个最小正周期为2的奇函数.(1) 求的值;(2)的单调区间和最值.】;主要考察你对正弦函数的图象与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040333-82807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040333-66755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040334-74241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040334-45868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040334-40586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040325-62239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040325-50779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040325-11079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040325-69932.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040326-36260.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040326-45047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040326-51977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040326-12299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040326-80021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040304-16285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040305-67706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040305-64926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040305-13262.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040305-13262.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040305-90578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040301-72952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040301-95191.png)
A.向右平移![]() | B.向右平移![]() | C.向左平移![]() | D.向左平移![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-33163.png)
(1) 求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-76421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-76421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-75894.png)
(3)借助”五点作图法”画出函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-76421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-78794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040245-76421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040246-70436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911040246-41636.jpg)
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