![](https:///quesimg/Upload/formula/fdc7dfc6468b254c1bd101d7f2e6f0b2.png)
![](https:///quesimg/Upload/formula/0a8fa64fec535f51aacbae6480e744d1.png)
![](https:///quesimg/Upload/formula/7903097d9663549d86e6267da59537a2.png)
A.若点A在圆C上,则直线l与圆C相切 | B.若点A在圆C内,则直线l与圆C相离 |
C.若点A在圆C外,则直线l与圆C相离 | D.若点A在直线l上,则直线l与圆C相切 |
![](http://static.xuejinqu.com/images/y-prise.png)
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)