平面直角坐标系
[ ]
A.(1,1) |
B.(1,![]() |
C.(![]() ![]() |
D.(![]() ![]() |
A.π | B.4 | C.4π | D.16 |
A.一条平行于x轴的直线 | B.一条垂直于x轴的直线 |
C.一个圆 | D.一条抛物线 |
A.ρsinθ=1 |
B.ρsinθ=![]() |
C.ρcosθ=1 |
D.ρcosθ=![]() |
π |
6 |
7π |
6 |
A.(x-1)2+y2=1 | B.x2+(y-1)2=1 | C.(x+1)2+y2=1 | D.x2+y2=2 |
2 |
π |
4 |
|
5 |
5 |
A.(2,![]() |
B.(-2,-![]() |
C.(![]() |
D.(-![]() |
A.(![]() ![]() |
B.(-![]() ![]() |
C.(![]() ![]() |
D.(-![]() ![]() |
A.(2,0) |
B.![]() |
C.(2,π) |
D.![]() |
3 |
π |
3 |