Amitabh Udayiman
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 Apr 13 awarded Revival Jun 28 awarded Notable Question Sep 30 awarded Explainer Sep 24 awarded Autobiographer Nov 8 awarded Popular Question May 4 awarded Yearling Jun 8 awarded Constituent Jun 8 awarded Caucus May 7 comment Point on the bisector and excenter I think yes.That's what the OP meant. May 7 comment A trigonometric identity: $(\sin x)^{-2}+(\cos x)^{-2}=(\tan x+\cot x)^2$ @ Farhad Yusufali Check the third and fourth terms in line 2 of what you have done. May 7 awarded Commentator May 7 comment A trigonometric identity: $(\sin x)^{-2}+(\cos x)^{-2}=(\tan x+\cot x)^2$ Ok, then please post that mess here.The problem is not messy at all.That way you can get feedback on where you went wrong. May 7 revised When did mathematicians think of axiomatically building or defining operations etc? added 399 characters in body May 7 awarded Quorum May 7 asked When did mathematicians think of axiomatically building or defining operations etc? May 7 comment Why are imaginary numbers called imaginary numbers @ J.M. That was an informative article too. May 7 answered Why are imaginary numbers called imaginary numbers May 7 answered How do I use substitution in integrals? May 7 revised Opinions on foundational math materials to teach 8th grade, 9th grade kids at a Summer Camp Added something May 7 comment How do I use substitution in integrals? It helps to consult a standard textbook in calculus. :)