User Mike Pierce

99 votes

Do "other" trigonometric functions than Tan Sin Cos and their derivatives exist?

answered Jun 22, 2015 at 1:06

62 votes

Accepted

Why do we miss 8 in the decimal expansion of 1/81, and 98 in the decimal expansion of 1/9801?

answered Oct 27, 2014 at 23:35

34 votes

Set builder notation: Colon or Vertical Line

answered Oct 28, 2015 at 8:02

28 votes

Accepted

Is it bad to resort to numerical examples to understand the idea behind a proof?

answered Jun 19, 2020 at 19:16

20 votes

Accepted

Showing a function has exactly one zero with IVT and Rolle's Theorem

answered Mar 9, 2018 at 4:52

18 votes

When you inscribe a triangle in a circle in a triangle in a circle in a triangle ...

answered Mar 2, 2018 at 5:55

17 votes

Accepted

What is an adjective for "weaker than weak"?

answered May 24, 2015 at 18:42

16 votes

Accepted

Can two unknowns of two unrelated linear equations be determined?

answered Jan 4, 2015 at 20:49

15 votes

How can an isolated point be an open set?

answered Jan 2, 2017 at 7:44

14 votes

What does this double sided arrow $\longleftrightarrow$ mean?

answered Jan 18, 2016 at 1:49

14 votes

How are proofs formatted when the answer is a counterexample?

answered Jul 7, 2016 at 23:27

13 votes

Accepted

A formula to convert a counter-clockwise angle to clockwise angle with an offset

answered Dec 26, 2015 at 18:36

13 votes

Must subgroups sharing a common element be nested in each other?

answered Oct 17, 2016 at 15:20

11 votes

Accepted

What made the proof of the four color theorem on planes so hard?

answered Jan 4, 2016 at 23:24

11 votes

Accepted

why $\tan x = \frac{\sin x}{\cos x}$? and not $\tan x$ = opposite/adjacent?

answered May 28, 2015 at 19:32

11 votes

Accepted

Given $a+b+c$, Can I calculate $a^2+b^2+c^2$?

answered Jan 4, 2015 at 18:14

10 votes

Why am I getting $1$ instead of $e$?

answered Jun 16, 2021 at 20:11

10 votes

Is there an equivalent word for '3/4?'

answered Jul 13, 2016 at 0:55

10 votes

How to find the solutions to $\frac{11}{2} x - \cos x = 0$?

answered Aug 19, 2016 at 5:23

9 votes

Accepted

How to determine the value of a variable in a matrix to make it linearly independent of two other given matrices.

answered Nov 5, 2017 at 3:02

9 votes

Accepted

An example of evaluating an integral using partial fraction decomposition

answered May 16, 2017 at 1:34

8 votes

What is the smallest group containing all finite cyclic groups?

answered Nov 20, 2020 at 15:54

8 votes

What's an intuitive explanation for integration?

answered Jul 1, 2021 at 15:18

8 votes

Accepted

Has this approximation $0.41468250985111166$ a name?

answered May 23, 2015 at 23:46

8 votes

Open Ball in a Metric Space vs. Open Set in a Topological Space

answered Nov 2, 2015 at 3:33

8 votes

Finding how many 8-bit bytes contain an even number of zeros . . .

answered Mar 7, 2016 at 3:29

8 votes

A question about sequence and subsequences

answered Nov 5, 2017 at 2:31

8 votes

Prove that trees have at least two vertices of degree one

answered Jan 5, 2017 at 22:10

8 votes

Accepted

Graphing $\left(\;(4x -2 \leq 6 \;\text{ and }\; 3-x \leq 7)\;\text{ or }\;(3x > 18 \;\text{ and }\; 2x-9 \geq 11)\;\right)$

answered Oct 10, 2018 at 7:56

7 votes

Accepted

Definition/Clarification of Graph Embeddings

answered Sep 1, 2015 at 18:53

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466 Answers

Do "other" trigonometric functions than Tan Sin Cos and their derivatives exist?

Why do we miss 8 in the decimal expansion of 1/81, and 98 in the decimal expansion of 1/9801?

Set builder notation: Colon or Vertical Line

Is it bad to resort to numerical examples to understand the idea behind a proof?

Showing a function has exactly one zero with IVT and Rolle's Theorem

When you inscribe a triangle in a circle in a triangle in a circle in a triangle ...

What is an adjective for "weaker than weak"?

Can two unknowns of two unrelated linear equations be determined?

How can an isolated point be an open set?

What does this double sided arrow $\longleftrightarrow$ mean?

How are proofs formatted when the answer is a counterexample?

A formula to convert a counter-clockwise angle to clockwise angle with an offset

Must subgroups sharing a common element be nested in each other?

What made the proof of the four color theorem on planes so hard?

why $\tan x = \frac{\sin x}{\cos x}$? and not $\tan x$ = opposite/adjacent?

Given $a+b+c$, Can I calculate $a^2+b^2+c^2$?

Why am I getting $1$ instead of $e$?

Is there an equivalent word for '3/4?'

How to find the solutions to $\frac{11}{2} x - \cos x = 0$?

How to determine the value of a variable in a matrix to make it linearly independent of two other given matrices.

An example of evaluating an integral using partial fraction decomposition

What is the smallest group containing all finite cyclic groups?

What's an intuitive explanation for integration?

Has this approximation $0.41468250985111166$ a name?

Open Ball in a Metric Space vs. Open Set in a Topological Space

Finding how many 8-bit bytes contain an even number of zeros . . .

A question about sequence and subsequences

Prove that trees have at least two vertices of degree one

Graphing $\left(\;(4x -2 \leq 6 \;\text{ and }\; 3-x \leq 7)\;\text{ or }\;(3x > 18 \;\text{ and }\; 2x-9 \geq 11)\;\right)$

Definition/Clarification of Graph Embeddings