Question regarding the proof of $\pi$ is transcendental.
100725
Let $a$ be an algebraic number, prove that $ia$ is also algebraic
45422
Why is Euclid's proof on the infinitude of primes considered a proof?
45432
Showing that $f:(0,2\pi]\to S^1$ is not a homeomorphism
37642
Why is $\pi$ irrational if it is represented as $C/D$?
140459
Why is $\left(e^{2\pi i}\right)^i \neq e^{-2 \pi}$?
105707
A proof of $\int_{0}^{1}\left( \frac{\ln t}{1-t}\right)^2\,\mathrm{d}t=\frac{\pi^2}{3}$
126484
Why is $\Gamma\left(\frac{1}{2}\right)=\sqrt{\pi}$?
18285
Prove that $\prod_{k=1}^{n-1}\sin\frac{k \pi}{n} = \frac{n}{2^{n-1}}$
50038
Proving that $e^\pi=e^{-\pi}$
51314
How to prove that a complex number is not a root of unity?
48651
Prove that $\int_0^1t^{p-1}(1-t)^{q-1}\,dt=\frac{\Gamma(p)\Gamma(q)}{\Gamma(p+q)}$ for positive $p$ and $q$
43184
Using the Residue Theorem to Prove that $\int^{2\pi}_{0} \frac{1}{(a+\cos\theta)^{2}} d \theta=\frac{2\pi a}{(a^{2}-1)^{3/{2}}}.$
100399
A doubt with a part of a certain proof.
13747
Proof of $\int_0^\infty \frac{\sin x}{\sqrt{x}}dx=\sqrt{\frac{\pi}{2}}$
46353
Proof that $\cos(\pi/3)=1/2$
118374
Is there a proof that $\pi$ is an irrational number?
43659
Why is $\pi$ so close to $3$?