![](http://static.xuejinqu.com/qimg/180/180ccc269e66b94a35b266b7daa87ac8.png)
![](http://static.xuejinqu.com/qimg/0d2/0d25f51b38def2097d9d8e52475b500d.png)
(1)求点A的坐标和∠AOB的度数;
(2)若将抛物线
![](http://static.xuejinqu.com/qimg/180/180ccc269e66b94a35b266b7daa87ac8.png)
(3)在(2)的情况下,判断点C′是否在抛物线
![](http://static.xuejinqu.com/qimg/180/180ccc269e66b94a35b266b7daa87ac8.png)
(4)若点P为x轴上的一个动点,试探究在抛物线m上是否存在点Q,使以点O、P、C、Q为顶点的四边形是平行四边形,且OC为该四边形的一条边?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)