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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
Apr
28
comment Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$?
@SufyanNaeem: No. First off, $b\neq 0$ since we're dividing by $b$. Beyond that, your example "since..." is not true because of the broad rule $\sqrt{ab}=\sqrt{a}\sqrt{b}$, but because of the narrower rule $\sqrt{-a}=i\sqrt{a}$ for $a>0$. In particular, take another look at the paragraph beginning "In general..." in my answer.
Apr
10
awarded  Famous Question
Apr
2
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Mar
3
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Jan
24
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Jan
4
awarded  Nice Answer
Dec
21
awarded  Constituent
Dec
8
awarded  Caucus
Nov
14
awarded  Nice Answer
Oct
16
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Sep
30
awarded  Explainer