Prove that $\sin(\pi z)$ can be written as infinite product
24311
Proving $\frac{\sin x}{x} =\left(1-\frac{x^2}{\pi^2}\right)\left(1-\frac{x^2}{2^2\pi^2}\right) \left(1-\frac{x^2}{3^2\pi^2}\right)\cdots$
39492
Finding $z\in \mathbb C$ with $\sin z = 2$?
147864
Convergence of infinite product of prime reciprocals?
119317
Proving the series of partial sums of $\sin (in)$ is bounded?
31451
Proving a subring of $\mathbb{Q}$ containing $\mathbb{Z}$ is a PID
137718
Prove that the complex expression is real
158502
Showing $\sin(\bar{z})$ is not analytic at any point of $\mathbb{C}$
14730
How prove this $\lim_{n\to \infty}\sin{n^m}$ divergent.
53307
how to strictly prove $\sin x<x$ for $0<x<\frac{\pi}{2}$
147886
Proof of the angle sum identity for $\sin$
281
How one can prove $\prod_{k=1}^{n-1} (\cos\theta-\cos(k\pi/n)) = 2^{1-n}\sin(n\theta)\csc\theta$?
73047
Proving surjectivity of $\cos(z)$ and $\sin(z)$ and find all $z : \cos(z) \in \mathbb R$ and all $z: \sin(z) \in \mathbb R$
143857
How to prove absolute summability of sinc function?
68858
Prove that $\prod_{n=2}^∞ \left( 1 - \frac{1}{n^4} \right) = \frac{e^π - e^{-π}}{8π}$
139168
Prove that there is an unique $z$ s.t. $f(z) = z$ where $z$ is a complex number
25967
Prove $\csc(x)=\sum_{k=-\infty}^{\infty}\frac{(-1)^k}{x+k\pi}$
27472
Prove that $PSL(2,\mathbb{Z})$ is free product of $C_2$ and $C_3$