Theorem Real.Angle.cos_eq_real_cos_iff_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_real_cos_iff_eq_or_eq_negView on Github →