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Real.Angle.cos_eq_iff_coe_eq_or_eq_neg
Modification history
2023-05-17 11:25
Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean
feat: port Analysis.SpecialFunctions.Trigonometric.Angle (#4040)
Added
Real.Angle.cos_eq_iff_coe_eq_or_eq_neg
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