Question

Fraction of even numbers in decimal expansion of $\pi$ and $e$.

score 40 · Answer 1 · 2026-02-23 15:34:52

40

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Fraction of even numbers in decimal expansion of $\pi$ and $e$.

Published on 23 Feb 2026 - 15:34

score 71 · Answer 2 · 2020-12-08 14:52:46

71

Views

Identifying this approximation of pi

Published on 08 Dec 2020 - 14:52

score 137 · Answer 3 · 2020-12-11 15:54:14

137

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Calculating error for $\pi$ in an expansion

Published on 11 Dec 2020 - 15:54

score 66 · Answer 4 · 2020-12-12 19:05:51

66

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Prove or disapprove $\pi = 3 + \sum_{n=1}^{\infty} \frac{(-1)^{n}(x_1^n + x_2^n)}{n+2}$ (hint needed)

Published on 12 Dec 2020 - 19:05

score 79 · Answer 5 · 2026-02-23 13:44:29

79

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I have derived a new formula for π. What should I do with it?

Published on 23 Feb 2026 - 13:44

score 416 · Answer 6 · 2026-02-24 00:28:05

416

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Calculate $\pi$ from digits of $\pi$

Published on 24 Feb 2026 - 0:28

score 175 · Answer 7 · 2026-03-27 16:25:20

175

Views

Show that : $\int_{0}^{\infty}\arctan\left(\frac{2}{x^2+1}\right)dx=\pi\sqrt{\phi^{-1}}$

Published on 27 Mar 2026 - 16:25

score 204 · Answer 8 · 2020-12-18 08:24:13

204

Views

Why does $\pi$ appear in the probability of a number being square-free?

Published on 18 Dec 2020 - 8:24

score 133 · Answer 9 · 2020-12-20 09:36:22

133

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How to prove this identity: $4\cdot(\frac12)!=\pi$

Published on 20 Dec 2020 - 9:36

score 60 · Answer 10 · 2020-12-22 14:31:17

60

Views

Properties of the digits of Square Roots of 2

Published on 22 Dec 2020 - 14:31

score 811 · Answer 11 · 2020-12-27 03:53:34

811

Views

A strange occurrence in the decimal digits of $\pi$?

Published on 27 Dec 2020 - 3:53

score 165 · Answer 12 · 2020-12-28 00:42:30

165

Views

Is there a positive series of rational numbers that converge to $\pi$?

Published on 28 Dec 2020 - 0:42

score 192 · Answer 13 · 2026-02-23 17:25:31

192

Views

Transcendence of $\pi+\log\alpha$ and $e^{\alpha\pi+\beta}$

Published on 23 Feb 2026 - 17:25

score 109 · Answer 14 · 2021-01-02 11:43:42

109

Views

Reducing $\cos(2\pi/3)$, $\tan(7\pi/4)$, and $\sin(7\pi/6)$

Published on 02 Jan 2021 - 11:43

score 157 · Answer 15 · 2021-01-06 07:11:23

157

Views

Infinite Rational numbers add up to give irrational numbers.

Published on 06 Jan 2021 - 7:11

List Question

Fraction of even numbers in decimal expansion of $\pi$ and $e$.

Identifying this approximation of pi

Calculating error for $\pi$ in an expansion

Prove or disapprove $\pi = 3 + \sum_{n=1}^{\infty} \frac{(-1)^{n}(x_1^n + x_2^n)}{n+2}$ (hint needed)

I have derived a new formula for π. What should I do with it?

Calculate $\pi$ from digits of $\pi$

Show that : $\int_{0}^{\infty}\arctan\left(\frac{2}{x^2+1}\right)dx=\pi\sqrt{\phi^{-1}}$

Why does $\pi$ appear in the probability of a number being square-free?

How to prove this identity: $4\cdot(\frac12)!=\pi$

Properties of the digits of Square Roots of 2

A strange occurrence in the decimal digits of $\pi$?

Is there a positive series of rational numbers that converge to $\pi$?

Transcendence of $\pi+\log\alpha$ and $e^{\alpha\pi+\beta}$

Reducing $\cos(2\pi/3)$, $\tan(7\pi/4)$, and $\sin(7\pi/6)$

Infinite Rational numbers add up to give irrational numbers.

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