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 Jan21 awarded Famous Question Mar29 awarded Nice Question May14 awarded Caucus Apr5 awarded Notable Question Dec4 awarded Popular Question Nov5 comment BOOL algebra : simplifications Yes, I am sure. Nov5 comment BOOL algebra : simplifications Now it makes sense ! Thanks again ! Nov5 comment BOOL algebra : simplifications I must be stupid but I don't get it. I understand the development of the general law but I can't make the relation with the development above. I have : A∨B = ... = A∨(¬A∧B) which is not equals to ¬(A∧B)∧(A∨B) ... Nov5 accepted BOOL algebra : simplifications Nov5 comment BOOL algebra : simplifications Thanks a lot for this answer ! Still, I don't understand why line (2) is algebraically equivalent to line (3). Nov3 asked BOOL algebra : simplifications Aug24 awarded Commentator Aug24 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument oh yes i got it, because it it a length ! (and length can't be negative...) Aug24 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument Yes thank you... I started to mix everything.. Now I am ok with everything :) Aug23 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument @Sasha : Thank you very much for your help ! I didn't pay attention to cos(3) < 0 Aug23 accepted Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument Aug23 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument why do we want it to be positive ? Aug23 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument I misunderstood abs and module notation for |cos(3)| , I thought it was module... Thank you for this wonderful answer ! Aug23 awarded Editor Aug23 comment Complex number + trigo : $-1 + \tan(3)i$ , find modulus and argument @Rahul: you are right ! I mistyped