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2025-01-24 双纽线r2=a2sin2θ -
2025-01-24 双纽线r^2=2a^2cos2θ -
2025-01-24 双纽线r2=2a2cos2θ图像 -
2025-01-24 双纽线π/4 -
2025-01-24 双纽线ds -
2025-01-24 双纽线2xy -
2025-01-24 双纽线x2+y2=a2(x2-y2) -
2025-01-24 双纽线的 -
2025-01-24 双纽线r^2=a^2cos2θ(a>0) -
2025-01-24 双纽线r2=a2cos2θ面积 -
2025-01-24 双纽线r2=a2sin2θ -
2025-01-24 双纽线r^2=2a^2cos2θ -
2025-01-24 双纽线r2=2a2cos2θ图像 -
2025-01-24 双纽线π/4 -
2025-01-24 双纽线ds -
2025-01-24 双纽线2xy -
2025-01-24 双纽线x2+y2=a2(x2-y2) -
2025-01-24 双纽线的 -
2025-01-24 双纽线r^2=a^2cos2θ(a>0) -
2025-01-24 双纽线r2=a2cos2θ面积