题目
题型:解答题难度:简单来源:不详
(本大题满分12分)已知点
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162908-63659.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162909-54844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162909-27829.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162909-72917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162909-42961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162910-91512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162910-29787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162910-19846.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162910-20602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162910-98399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162911-40968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162911-24582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162911-50481.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162911-88064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162912-50070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162912-75284.png)
解析
核心考点
试题【(本大题满分12分)已知点 (1)若,求的值;(2)若,其中是原点,且,求与的夹角。】;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/20190822/20190822162854-89823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162854-73794.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162854-55141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162855-89283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162828-80062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162828-32514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162828-44149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162829-12171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162829-90950.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162811-31228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162812-27944.png)
A.![]() | B.![]() | C.![]() | D.![]() |
①y=
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-41684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-30171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-41684.png)
②若x是第一象限的角,则
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-19739.png)
③在
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-75056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162742-60073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162743-64063.png)
④
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162743-40583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162743-95429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162744-73862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162736-95479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162737-21538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822162737-11957.png)
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