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Theorem real.cos_nonneg_of_neg_pi_div_two_le_of_le

Modification history

2021-04-14 18:40
src/analysis/special_functions/trigonometric.lean
feat(archive/100-theorems-list): add proof of Heron's formula (#6989) …
Added real.cos_nonneg_of_neg_pi_div_two_le_of_leView on Github →