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以平面直角坐标系的原点为极点,以x轴的正半轴为极轴,建立极坐标系,则曲线(φ为参...
以平面直角坐标系的原点为极点,以x轴的正半轴为极轴,建立极坐标系,则曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100029637238531/SYS201311031000296372385006_ST/0.png)
(φ为参数,φ∈R)上的点到曲线ρcosθ+ρsinθ=4(ρ,θ∈R)的最短距离是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100029637238531/SYS201311031000296372385006_ST/1.png)
B.0
C.1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100029637238531/SYS201311031000296372385006_ST/2.png)
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已知点P的极坐标是(1,π),则过点P且垂直极轴所在直线的直线方程是( )
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直线
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D.
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