Does $1 = 1 + 2i\pi$?
11089
For which complex $a,\,b,\,c$ does $(a^b)^c=a^{bc}$ hold?
33791
Is it generally true that $\arcsin \theta + \arccos \theta = \frac{\pi}{2}$?
50038
Proving that $e^\pi=e^{-\pi}$
157066
Do We Need the Digits of $\pi$?
46353
Proof that $\cos(\pi/3)=1/2$
147410
ArcTan(2) a rational multiple of $\pi$?
156782
Confused about complex numbers
151127
Confirm that $\int_{0}^{\infty}t^{-1}\sin t dt=\pi/2$
148647
If $\dfrac{4x^2-1}{4x^2-y^2}$ is an integer, then it is $1$
139411
Finding $\pi$ factorial
69279
If $\gcd(a,b)=1$ then, $\gcd(a^2,b^2)=1$
65300
Why is $\pi$ irrational?
44400
$e^{2\pi i x} = (e^{2\pi i})^x$: What happens if x is rational?
80710
Does $\int_{-1}^1 \frac 1 x dx$ equal zero?
67784
If $A + A^t = 2I$ then $\det(A) \geq 1$
118374
Is there a proof that $\pi$ is an irrational number?
5679
Why is $2\pi i \neq 0?$