How to prove that $\sin 1^\circ$ is irrational?
48225
Proving that $\sin1 $(radian) is irrational without using Taylor Series Expansion.
84558
Prove that the square root of a positive integer is either an integer or irrational
91744
Proving sum of sines is periodic when ratio of their frequencies is rational using differentation
7500
$\arctan$ of a square root as a rational multiple of $\pi$
76490
Proving that $\cos(\arcsin(x))=\sqrt{1-x^2}$
11069
Deciding whether $2^{\sqrt2}$ is irrational/transcendental
131634
Prove the irrationality of $0.235711131719...$
21237
$\sqrt{6}-\sqrt{2}-\sqrt{3}$ is irrational
33628
Prove that $\sin(\sqrt x)$ not periodic
92226
Prove $\sqrt6$ is irrational
109953
How to prove that $\sqrt 3$ is an irrational number?
39021
Proving that $\sqrt{2}+\sqrt{3}$ is irrational
54512
How do I prove: $\cos (\theta + 90^\circ) \equiv - \sin \theta $
40009
Show that $e^{\sqrt 2}$ is irrational
28347
Prove that $\sqrt 2 + \sqrt 3$ is irrational
64885
Irrational and rational sequence proof
78287
Prove that if $n$ is not the square of a natural number, then $\sqrt{n}$ is irrational.