sign⁻¹ a mil⁻¹

sign⁻¹ a circle⁻¹ | sign⁻¹ a turn⁻¹ | sign⁻¹ a r⁻¹ | sign⁻¹ a cyc⁻¹ | sign⁻¹ a 1/Rt Angle | sign⁻¹ a Quadrant⁻¹ | sign⁻¹ a Sextant⁻¹ | sign⁻¹ a rad⁻¹ | sign⁻¹ a °⁻¹ | sign⁻¹ a g⁻¹ | sign⁻¹ a g⁻¹ | sign⁻¹ a mil⁻¹ | sign⁻¹ a '⁻¹ | sign⁻¹ a "⁻¹