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Q&A

General Q&A about all branches of theoretical and applied mathematics, including closely-adjacent sciences where the central question is about the math.

44%
+2 −3
Why does “unless” mean “if not”?

2 answers  ·  posted 2y ago by PSTH‭  ·  edited 1y ago by Peter Taylor‭

33%
+0 −2
50%
+0 −0
How to derive some trigonometric formulas?

2 answers  ·  posted 1y ago by deleted user  ·  last activity 1y ago by deleted user

50%
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A formal-logic formula for decimal to binary conversion

3 answers  ·  posted 1y ago by deleted user  ·  last activity 1y ago by r~~‭

50%
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33%
+0 −2
If k = 1, why $n(n-1) \dots \color{red}{(n-k+1)} = n$?

1 answer  ·  posted 1y ago by DNB‭  ·  edited 1y ago by DNB‭

50%
+0 −0
"A occurred" vs. "something must happen"

1 answer  ·  posted 1y ago by DNB‭  ·  edited 1y ago by DNB‭

66%
+2 −0
How can I deduce which operation removes redundacies?

3 answers  ·  posted 2y ago by DNB‭  ·  edited 1y ago by DNB‭

33%
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50%
+1 −1
57%
+2 −1
Why are you permitted to define $1 − 1 + 1 − 1 + . . .$?

1 answer  ·  posted 1y ago by Chgg Clou‭  ·  last activity 1y ago by JRN‭

33%
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50%
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40%
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