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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. 在同一坐标系中,将曲线\(y=2\sin 3x\)变为曲线\(y=\sin x\)的伸缩变换是(    )
              A.\(\begin{cases} x=3x′ \\ y= \dfrac{1}{2}y′ \end{cases}\)
              B.\(\begin{cases}x{{"}}=3x & \\ y{{"}}= \dfrac{1}{2}y & \end{cases} \)
              C.\(\begin{cases} x=3x′ \\ y=2y′ \end{cases}\)
              D.\(\begin{cases} x′=3x \\ y′=2y \end{cases}\)
            • 5.

              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.\(\left( \left. 2,2kπ+ \dfrac{2π}{3} \right. \right)\),\((k∈Z)\)
            • 6. 曲线的极坐标方程\(ρ=4\sin θ\)化为直角坐标为\((\)  \()\)
              A.\(x^{2}+(y+2)^{2}=4\)
              B.\(x^{2}+(y-2)^{2}=4\)
              C.\((x-2)^{2}+y^{2}=4\)
              D.\((x+2)^{2}+y^{2}=4\)
            • 7.

              在同一坐标系中,将曲线\(y=2\sin 3x\)变为曲线\(yˈ=\sin xˈ\)的伸缩变换公式是(    )

              A.\(\begin{cases}x=3x{{{"}}} \\ y=2y{{{"}}}\end{cases} \)
              B.\(\begin{cases}x{{{"}}}=3x \\ y{{{"}}}=2y\end{cases} \)
              C.\(\begin{cases}x{{{"}}}=3x \\ y{{{"}}}= \dfrac{1}{2}y\end{cases} \)
              D.\(\begin{cases}x=3x{{{"}}} \\ y= \dfrac{1}{2}y{{{"}}}\end{cases} \)
            • 8.

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

              A.\(\left( 2,\dfrac{\pi }{3} \right)\)
              B.\(\left( 2,-\dfrac{\pi }{3} \right)\)
              C.\(\left( 2,\dfrac{2\pi }{3} \right)\)
              D.\(\left( 2,2k\pi +\dfrac{\pi }{3} \right),\left( k\in Z \right)\)
            • 9.

              将曲线\(C\)按伸缩变换公式\({ }\!\!\{\!\!{ }\begin{matrix} {x}{{{"}}}=2x \\ {y}{{{"}}}=3y \\\end{matrix}{ }\)变换后的曲线方程为\({{\left( {{x}{{{"}}}} \right)}^{2}}+{{\left( {{y}{{{"}}}} \right)}^{2}}=1\),则曲线\(C\)的方程为 \((\)     \()\)

              A.\(\dfrac{{{x}^{2}}}{4}+\dfrac{{{y}^{2}}}{9}=1\)
              B.\(\dfrac{{{x}^{2}}}{9}+\dfrac{{{y}^{2}}}{4}=1\)
              C.\(4{{x}^{2}}+9{{y}^{2}}=36\)
              D.\(4{{x}^{2}}+9{{y}^{2}}=1\)
            • 10.

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

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