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Theorem real.angle.cos_eq_iff_eq_or_eq_neg

Modification history

2022-07-27 17:03
src/analysis/special_functions/trigonometric/angle.lean
feat(analysis/special_functions/trigonometric/angle): equality of `cos` or `sin` (#15651) …
Modified real.angle.cos_eq_iff_eq_or_eq_negView on Github →
2021-10-31 11:57
src/analysis/special_functions/trigonometric/angle.lean
chore(analysis): move `real.angle` to a dedicated file (#10065) …
Modified real.angle.cos_eq_iff_eq_or_eq_negView on Github →
2019-02-23 11:37
src/analysis/exponential.lean
feat(*): polar co-ordinates, de moivre, trig identities, quotient group for angles (#745) …
Added real.angle.cos_eq_iff_eq_or_eq_negView on Github →