优优班--学霸训练营 > 知识点挑题
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            • 1.

              极坐标方程\(θ= \dfrac{π}{3}\left(ρ > 0\right),θ= \dfrac{2π}{3}\left(ρ > 0\right) \)和\(\rho =4\)所表示的曲线围成的面积为\((\)   \()\)

              A.\(\dfrac{16\pi }{3}\)
              B.\(\dfrac{8\pi }{3}\)
              C.\(\dfrac{4\pi }{3}\)
              D.\(\dfrac{2\pi }{3}\)
            • 2. 在极坐标系中,点\(A\)的极坐标是\((1,π)\),点\(P\)是曲线\(C\):\(ρ=2\sin θ\)上的动点,则\(|PA|\)的最小值是(    )
              A.\(0\)        
              B.\( \sqrt{2}\)
              C.\( \sqrt{2}\)\(+1\)            
              D.\( \sqrt{2}\)\(-1\)
            • 3. 在极坐标系中,点\(\left( \left. 2, \dfrac{π}{3} \right. \right)\)到圆\(ρ=2\cos θ\)的圆心的距离为\((\)  \()\)
              A.\(2\)    
              B.\( \sqrt{4+ \dfrac{π^{2}}{9}}\)
              C.\( \sqrt{1+ \dfrac{π^{2}}{9}}\)
              D.\( \sqrt{3}\)
            • 4.

              在极坐标系中,圆\({ }\!\!\rho\!\!{ }={\sin }\theta \)的圆心的极坐标是(    )

              A.\(\left( 1,\dfrac{\pi }{2} \right)\)
              B.\(\left( 1,0 \right)\)
              C.\(\left( \dfrac{1}{2},\dfrac{\pi }{2} \right)\)
              D.\(\left( \dfrac{1}{2},0 \right)\)
            • 5.

              在直角坐标系中,点\(P\)坐标是\((-3,3)\),以原点为极点,\(x\)轴正半轴为极轴建立的极坐标系中,点\(P\)的极坐标是(    )

              A.\(\left(3 \sqrt{2}, \dfrac{3π}{4}\right) \)
              B.\(\left(3 \sqrt{2}, \dfrac{5π}{4}\right) \)
              C.\(\left(3, \dfrac{5π}{4}\right) \)
              D.\(\left(3, \dfrac{3π}{4}\right) \)
            • 6.

              点\(M\)的直角坐标是\((-1, \sqrt{3})\),则点\(M\)的极坐标为\((\)  \()\)

              A.\(\left( \left. 2, \dfrac{π}{3} \right. \right)\)
              B.\(\left( \left. 2,- \dfrac{π}{3} \right. \right)\)

              C.\(\left( \left. 2, \dfrac{2π}{3} \right. \right)\)
              D.\(\left( \left. 2,2kπ+ \dfrac{2π}{3} \right. \right)\),\((k∈Z)\)
            • 7.

              在极坐标系中,过点\((-3, -\dfrac{\pi }{2})\)且平行于极轴的直线的极坐标方程是

              A.\(\rho \sin \theta =-3\)
              B.\(\rho \cos \theta =-3\)
              C.\(\rho \sin \theta =3\)
              D.\(\rho \cos \theta =3\)
            • 8.

              \(7\cos θ+2\sin θ=0\)表示(    )

              A.直线     
              B.圆    
              C.椭圆  
              D.双曲线
            • 9.

              在极坐标系中,点\(P(ρ,-θ)\)关于极点对称的点的一个坐标是(    )

              A.\((-ρ,-θ)\)    
              B.\((ρ,-θ)\)          
              C.\((ρ,π-θ)\)            
              D.\((ρ,π+θ)\)
            • 10.

              在极坐标系中,点\(M(2{,}\dfrac{\pi}{3})\)到直线\(l\):\(\rho\sin(\theta{+}\dfrac{\pi}{4}){=}\dfrac{\sqrt{2}}{2}\)的距离为\((\)  \()\)

              A.\(\dfrac{\sqrt{3}}{2}\)
              B.\(\dfrac{\sqrt{6}}{2}\)
              C.\(\dfrac{3}{2}\)
              D.\(\sqrt{2}\)
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