$ \arctan \sqrt 2 $ is not a rational multiple of $\pi $
7500
$\arctan$ of a square root as a rational multiple of $\pi$
11935
Is $\mathbb{Z} \left[ \frac{1+i \sqrt{7}}{2} \right]$ euclidean?
106242
Why no common factors in proving root 2 is irrational?
93365
Solutions of $\arctan x = 1 - x$. Proofs?
68315
Why doesn't multiplying square roots of imaginary numbers follow $\sqrt{a} \times \sqrt{b} = \sqrt{ab}$?
32
Is $n^{th}$ root of $2$ an irrational number?
44630
Is $\frac{1}{\sqrt{2}}$ a fraction or not?
48086
Why is this series of square root of twos equal $\pi$?
127830
proof that $\sqrt(2)$ is irrational / why is the fraction irreducible
21237
$\sqrt{6}-\sqrt{2}-\sqrt{3}$ is irrational
37642
Why is $\pi$ irrational if it is represented as $C/D$?
150576
When is an Integer a Rational Number, and are All Ratios Rational, Even $\frac{\sqrt{7}}{2}$?
84017
Is $\sqrt[3]{2}$ contained in $\mathbb{Q}(\zeta_n)$?
44307
Prove $\sqrt[3]{3} \notin \mathbb{Q}(\sqrt[3]{2})$
1859
Proving $\arctan(\sqrt{x^2+1}-x)=\frac{\pi}{4}-\frac{1}{2}\arctan(x)$
2348
Show that the sphere, S, and $\mathbb{R}^2$ is not homeomorphic
37915
$\sqrt{2}$ is irrational proof using well-Ordering Property