Question

How to solve the cubic $x^3-3x+1=0$?

score 290 · Answer 1 · 2026-03-24 22:01:22

290

Views

How to solve the cubic $x^3-3x+1=0$?

Published on 24 Mar 2026 - 22:01

score 275 · Answer 2 · 2026-03-29 17:18:03

275

Views

$\sin(2\pi q)$ is algebraic over $\mathbb{Q}$

Published on 29 Mar 2026 - 17:18

score 220 · Answer 3 · 2026-03-28 14:25:56

220

Views

Compute the complex number $\cos \left(\frac\pi4 + \frac\pi4i\right)$

Published on 28 Mar 2026 - 14:25

score 1k · Answer 4 · 2018-04-16 10:39:05

1k

Views

Find $\frac{\tan 54-\tan 2}{\frac{\sin 2}{\cos 6}+\frac{\sin 6}{\cos 18}+\frac{\sin 18}{\cos 54}}$

Published on 16 Apr 2018 - 10:39

score 51 · Answer 5 · 2026-03-27 16:01:37

51

Views

Composition of $h(x)=f(|g(x)|)+|f(g(x))|$

Published on 27 Mar 2026 - 16:01

score 293 · Answer 6 · 2026-03-24 23:45:09

293

Views

Repeated applications of cos function converges around $0.7390851$

Published on 24 Mar 2026 - 23:45

score 126 · Answer 7 · 2018-04-16 17:10:23

126

Views

Calculate sin(x) over sin(y)

Published on 16 Apr 2018 - 17:10

score 434 · Answer 8 · 2026-03-25 01:18:40

434

Views

What is $x$, if $\cot ^{-1} \left(3x+\frac{2}{x}\right)+\cot ^{-1} \left(6x+\frac{2}{x}\right)+\cot ^{-1} \left(10x+\frac{2}{x}\right)+\cdots = 1$?

Published on 25 Mar 2026 - 1:18

score 115 · Answer 9 · 2026-03-25 12:53:15

115

Views

For rotation matrix $A$, find $B = A^4- A^3 + A^2 - A$

Published on 25 Mar 2026 - 12:53

score 1.7k · Answer 10 · 2018-04-16 19:54:37

1.7k

Views

Simple way to find position on square given angle at center

Published on 16 Apr 2018 - 19:54

score 53 · Answer 11 · 2018-04-16 20:12:22

A triangle has sides $3$, $5$, and $7$. Express $\cos(y)+\sin(y)$, where $y$ is the largest angle in the triangle.

score 56 · Answer 12 · 2018-04-17 01:00:41

56

Views

Trig question - should be easy but it's probably lacking information

Published on 17 Apr 2018 - 1:00

score 349 · Answer 13 · 2026-03-25 17:52:54

349

Views

Find the angle inside a triangle in terms of two variables : $\alpha,\beta$

Published on 25 Mar 2026 - 17:52

score 218 · Answer 14 · 2018-04-16 22:33:08

218

Views

How one can calculate the effect of airplane angle deviation on the final position?

Published on 16 Apr 2018 - 22:33

score 316 · Answer 15 · 2026-03-31 23:48:43

316

Views

An expression for sin(40)

Published on 31 Mar 2026 - 23:48

List Question

How to solve the cubic $x^3-3x+1=0$?

$\sin(2\pi q)$ is algebraic over $\mathbb{Q}$

Compute the complex number $\cos \left(\frac\pi4 + \frac\pi4i\right)$

Find $\frac{\tan 54-\tan 2}{\frac{\sin 2}{\cos 6}+\frac{\sin 6}{\cos 18}+\frac{\sin 18}{\cos 54}}$

Composition of $h(x)=f(|g(x)|)+|f(g(x))|$

Repeated applications of cos function converges around $0.7390851$

Calculate sin(x) over sin(y)

What is $x$, if $\cot ^{-1} \left(3x+\frac{2}{x}\right)+\cot ^{-1} \left(6x+\frac{2}{x}\right)+\cot ^{-1} \left(10x+\frac{2}{x}\right)+\cdots = 1$?

For rotation matrix $A$, find $B = A^4- A^3 + A^2 - A$

Simple way to find position on square given angle at center

A triangle has sides $3$, $5$, and $7$. Express $\cos(y)+\sin(y)$, where $y$ is the largest angle in the triangle.

Trig question - should be easy but it's probably lacking information

Find the angle inside a triangle in terms of two variables : $\alpha,\beta$

How one can calculate the effect of airplane angle deviation on the final position?

An expression for sin(40)

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