题目
题型:不详难度:来源:
FA |
OA |
答案
P |
2 |
3 |
代入y2=2px得(
3 |
p |
2 |
解得x=p(负值舍去).
∴A(
3 |
2 |
3 |
∴|
OA |
(
|
| ||
2 |
核心考点
试题【设O是坐标原点,F是抛物线y2=2px(p>0)的焦点,A是抛物线上的一个动点,FA与x轴正方向的夹角为60°,求|OA|的值.】;主要考察你对平面向量模和夹角的坐标表示等知识点的理解。[详细]
举一反三
a |
b |
a |
b |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005453-84373.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005453-26909.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005453-52163.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005454-57361.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005454-61220.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005454-33232.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005453-26909.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005454-57361.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105005454-33232.jpg)
FA |
OA |
P |
2 |
3 |
3 |
p |
2 |
3 |
2 |
3 |
OA |
(
|
| ||
2 |
a |
b |
a |
b |