Theorem Real.Angle.cos_nonneg_iff_abs_toReal_le_pi_div_two

Modification history

2023-05-17 11:25
Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean
feat: port Analysis.SpecialFunctions.Trigonometric.Angle (#4040)
Added Real.Angle.cos_nonneg_iff_abs_toReal_le_pi_div_twoView on Github →