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 Feb9 awarded Notable Question Jul2 awarded Curious Mar3 comment Fourier transform vs Fourier series @Inquisitive Thanks for the comment, now I understand it too Oct17 awarded Popular Question Sep20 awarded Commentator Sep20 accepted Why is the determinant zero iff thee column vectors are linearly dependent? Sep20 comment Why is the determinant zero iff thee column vectors are linearly dependent? @BabakS. I know they're the same, so I only asked about one case since I thought it'd be simpler to explain. Sep20 asked Why is the determinant zero iff thee column vectors are linearly dependent? Aug12 awarded Popular Question Nov5 awarded Yearling Oct8 comment Equal trigonometric expressions? Actually, I have figured it out. I accidentally put cos 0 = 0 instead of 1. Thank you for the help! Oct8 accepted Equal trigonometric expressions? Oct8 comment Equal trigonometric expressions? @Didier Sorry, did not know about that. Will definitely put everything in the question next time! Oct7 comment Equal trigonometric expressions? Heh, I was doing this with a definite integral, so the constant does matter, and I got an incorrect answer. What did I do wrong with my integration? Oct7 asked Equal trigonometric expressions? Sep29 asked When should I put an absolute value sign around a function? Mar18 accepted Square roots — positive and negative Mar18 asked Matrix bracket notation Mar11 asked Square roots — positive and negative Jan18 comment Does the derivative with respect to something have to be a variable? Thank you! with respect to . With respect to what?