Is it possible to write $\tan^{-1}(x)$ as a power series of $\tanh(x)$?
31379
Relationship between $\tanh x$ and $\arctan x$
7296
Prove $(1-\cos x)/\sin x = \tan x/2$
146594
Prove that $\frac{d}{dx}(\tan^{-1}(x))=\frac{1}{1+x^2}dx$
97326
Find $\lim_{x \to 0} (\frac{\tan(x)}{x})^{\frac{1}{x}}$
2584
Convergence of an alternating series : $ \sum_{n\geq 1} \frac{(-1)^n|\sin n|}{n}$
82286
Derivation of asymptotic solution of $\tan(x) = x$.
138914
Reduction formula for $\int \tan^n x dx$
31063
Evaluating $\int_0^2(\tan^{-1}(\pi x)-\tan^{-1} x)\,\mathrm{d}x$
61547
Derive an explicit formula for a power series $\sum_{n=1}^\infty n^2x^n$
68550
What is the radius of convergence of the Taylor series of $\frac{2\tan x}{1+4x^2}$ around $x=0?$
27132
Can't figure out how $\sin\left(\tan^{-1}(x)\right)=\frac{x}{\sqrt {x^2+1}}$
126762
taylor series of $\ln(1+x)$?
116014
Write $\frac {1}{1+z^2}$ as a power series centered at $z_0=1$
140221
Product of two power series
92176
Solving $\lim_{n\to\infty}(n\int_0^{\pi/4}(\tan x)^ndx)$?
82170
Solve $x = \frac{1}{2}\tan(x)$
30480
Continued product in $\sin$ series