Isaac
Reputation
26,006
84/100 score
 Mar 11 awarded Good Answer Feb 19 awarded Great Answer Feb 16 awarded Guru Jan 26 awarded Popular Question Jan 18 awarded Famous Question Jan 7 comment Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? @JohannesHahn: What you describe is what I'm calling the domain of the identity and I'm not making that terminology up myself. I've seen it used in several texts. Dec 23 awarded Nice Answer Dec 23 awarded Nice Answer Nov 15 awarded Popular Question Oct 3 awarded Nice Answer Sep 19 awarded Notable Question Aug 2 revised How many ways are there to define sine and cosine? added 10 characters in body Jul 22 comment Penrose Tile generator Being able to fill a rectangular region is different from creating a tileable rectangle (a rectangle for which opposite edges can be glued together to continue the pattern seamlessly). Jul 20 awarded Yearling Jul 15 comment How to find shortest distance between two skew lines in 3D? If $D_1=D_2$, the lines aren't skew. Jul 11 awarded Nice Answer Jul 2 awarded Good Answer Jun 30 awarded Notable Question Jun 27 awarded Good Answer May 12 revised Area of a triangle from some of its parts deleted 2 characters in body