Why is it so that the principal value of $\operatorname*{arccot} x$ is between $0$ and $\pi$?
104490
Range of $\operatorname{arccot}(x)$
52621
Why is $\det(A - \lambda I)$ zero?
130207
Why is the p-value written with a supremum?
5679
Why is $2\pi i \neq 0?$
96805
Why is the Absolute Value of $3-π$ equal to $π - 3$
156235
Are $x \cdot 0 = 0$, $x \cdot 1 = x$, and $-(-x) = x$ axioms?
81375
Why does $V(I(S))=\overline{S}$?
75679
How to prove that $2 \arctan\sqrt{x} = \arcsin \frac{x-1}{x+1} + \frac{\pi}{2}$
145521
Why does $\arctan(x)= \frac{1}{2i}\log \left( \frac{x-i}{x+i}\right)+k$?
63870
Why small p-value rejects $H_0$
112179
Why don't the results of testing $H_0 : \beta = 0$ and $H_0 : {\rm cor}(X,Y)=0$ agree?
119815
Why is $\tan((1/2)\pi)$ undefined?
130253
Differentiating $\mbox{tr} (ABA^TC)$ w.r.t. $A$
35454
Is it correct to write $\Bbb E[X]$ or $\Bbb E_{\theta}[X]$?
100817
Generalizing $\int_{0}^{1} \frac{\arctan\sqrt{x^{2} + 2}}{\sqrt{x^{2} + 2}} \, \frac{\operatorname dx}{x^{2}+1} = \frac{5\pi^{2}}{96}$
49444
Why isn't $e^{2\pi xi}=1$ true for all $x$?
45892
arccot limit: $\sum_{r=1}^{\infty}\cot ^{-1}(r^2+\frac{3}{4})$