3.
\((1)\)点\(P\)的柱坐标为\((ρ,θ,z)\)
\(①\)当\(ρ\)为常数时,点\(P\)的轨迹是________.
\(②\)当\(θ\)为常数时,点\(P\)的轨迹是________.
\(③\)当\(z\)为常数时,点\(P\)的轨迹是________.
\((2)\)点\(P\)的球坐标为\((r,j,θ)\),
\(①\)当\(r\)为常数时,点\(P\)的轨迹是________.
\(②\)当\(j\)为常数时,点\(P\)的轨迹是________.
\(③\)当\(θ\)为常数时,点\(P\)的轨迹是________.