题目
题型:单选题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-98223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-38829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-48477.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
由
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-98223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-38829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172653-45385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172653-61025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172654-28396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172652-53985.png)
【点评】准确由题目所给条件判断出角
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172653-45385.png)
核心考点
试题【已知,且,则=( )A.B.C.D.】;主要考察你对任意角三角函数的概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172632-47725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172632-73487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172633-95645.png)
为
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172615-71657.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172615-16629.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172615-90253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172615-63819.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172615-27424.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-25444.gif)
在一个周期内,当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-46646.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-38607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-23404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-47383.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172616-38607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172617-13058.gif)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172617-34507.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172617-49474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172617-70998.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-84814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-91956.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-84814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-81010.gif)
c
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-84814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172557-39652.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172558-96040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172558-54258.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172558-40975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172558-39015.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172558-81841.gif)
(2)若a与b的夹角为
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172559-66480.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172559-18866.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172531-29622.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172436-90359.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172436-29615.gif)
(Ⅰ)(设
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172436-62576.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172437-52528.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172437-60490.gif)
(Ⅱ)在△ABC中,AB=1,
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172438-27935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172438-85769.gif)
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