题目
题型:不详难度:来源:
已知角
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021621-55346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-21850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-12578.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-24081.png)
(Ⅱ)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-66846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-46281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-60992.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-83077.png)
(Ⅱ)函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-46281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-49254.png)
解析
(1)根据角
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021621-55346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-21850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-12578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021621-55346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-24081.png)
(2)因为函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-66846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-46281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-60992.png)
解:(Ⅰ)因为角
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021621-55346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021622-12578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-89208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021624-12791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021624-66617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021624-23339.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021625-63687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021625-70025.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021625-15739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021625-64218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-46281.png)
所以函数
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-46281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021623-49254.png)
核心考点
试题【.(本小题满分12分)已知角的顶点在原点,始边与轴的正半轴重合,终边经过点. (Ⅰ)求的值;(Ⅱ)若函数,求函数在上的单调递增区间. 】;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/20190911/20190911021616-60335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021617-52962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021617-68291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021617-37982.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021604-73247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021604-42566.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021605-94556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021605-65510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021605-61746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021605-56684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021605-99418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021606-88529.png)
的等差数列,求
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021606-51927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021559-25059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021559-93295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021600-93098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021600-30422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021556-88870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021556-11383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021557-83852.png)
A.4 | B.6 | C.8 | D.12 |
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021550-87101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190911/20190911021550-68873.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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