Give the smallest positive value of $x$ for which $\tan x$ is undefined.
119815
Why is $\tan((1/2)\pi)$ undefined?
80488
Explanation of method for showing that $\frac{0}{0}$ is undefined
152074
How to find out the global minimum of the following expression
65239
Find $\lim_{x \to 0} \frac{x - \tan(x)}{x - \sin(x)}$
154172
Finding $\tan t$ if $t=\sum\tan^{-1}(1/2t^2)$
149376
How to Find $ \lim\limits_{x\to 0} \left(\frac {\tan x }{x} \right)^{\frac{1}{x^2}}$.
134159
Smallest value of $a^2 + b^2 + c^2+ d^2$, given values for $(a+b)(c+d)$, $(a+c)(b+d)$, and $(a+d)(b+c)$
63071
the least possible value for :$ \lfloor \frac{a+b}{c}\rfloor +\lfloor \frac{b+c}{a} \rfloor+\lfloor \frac{c+a}{b} \rfloor $
118949
If $(Tx \mathbin{|} x) = 0$ for all $x$ then $T = 0$
39504
Why does $ \frac{2x}{2+x}$ provide a particularly tight lower bound for $\ln(1+x)$ for small positive values of $x$?
38271
Which is the easiest way to evaluate $\int \limits_{0}^{\pi/2} (\sqrt{\tan x} +\sqrt{\cot x})$?
123997
Finding an expression for $\tan (a+ b + y)$ which involves only $\tan a, \tan b,$ and $\tan y$.
2491
For $0 < x < \pi/2 $, prove that $x + \frac{x^{3}}{3} <\tan x $
88989
Why $x<\tan{x}$ while $0<x<\frac{\pi}{2}$?
97326
Find $\lim_{x \to 0} (\frac{\tan(x)}{x})^{\frac{1}{x}}$
31448
Calculate $\int\left( \sqrt{\tan x}+\sqrt{\cot x}\right)dx$
23288
Prove that $x^2<\sin x \tan x$ as $x \to 0$