New posts in trigonometric-series

How to evaluate $\sum\limits_{k=0}^{n-1} \sin^t(\pi k/2n)$?

sequences-and-series trigonometry complex-numbers trigonometric-series

Relationship Between Sine as a Series and Sine in Triangles

calculus trigonometry taylor-expansion trigonometric-series

Taylor Series of $\tan x$

taylor-expansion trigonometric-series

Closed form for $\sum_{n=1}^\infty\frac{\cos(\pi \log n)}{n^2}$

sequences-and-series logarithms closed-form trigonometric-series

On $\mathrm{\sum\limits_{x=1}^\infty Ci(x)}$.

calculus sequences-and-series special-functions trigonometric-series constants

Convergence of $\sum \frac{\sin(n^2)}{n}$

sequences-and-series asymptotics trigonometric-series

A Sine and Inverse Sine integral

integration trigonometric-series

Consecutively Adding Sines

pi trigonometric-series

How do you find the value of $\sum_{r=0}^{44} \tan^2(2r+1)$?

complex-numbers summation contest-math trigonometric-series

Asymptotic behaviour of sum

limits trigonometry summation fibonacci-numbers trigonometric-series

Sinusoids as solutions to differential equations

ordinary-differential-equations harmonic-analysis trigonometric-series

Finite sum $\sum_{n=2}^N\frac{1}{n^2}\sin^2(\pi x)\csc^2(\frac{\pi x}{n})$

number-theory trigonometry summation analytic-number-theory trigonometric-series

Proof of $\sum_{n=1}^{\infty}\frac1{n^3}\frac{\sinh\pi n\sqrt2-\sin\pi n\sqrt2}{{\cosh\pi n\sqrt2}-\cos\pi n\sqrt2}=\frac{\pi^3}{18\sqrt2}$

sequences-and-series number-theory trigonometry trigonometric-series

Is $\sum_{a=0}^m\sum_{b=0}^n\cos(abx)$ always positive?

real-analysis inequality trigonometric-series

$\sin x + \sin 2x + \sin 3x ...$ = $\cot \frac{1}{2}x$? [duplicate]

trigonometry trigonometric-series

$\sum_{n=0}^{\infty} \sin (nx) = \cot(x/2)$?

trigonometry trigonometric-series

Closed form for $\prod_{n=1}^\infty\sqrt[2^n]{\tanh(2^n)},$

calculus closed-form infinite-product hyperbolic-functions trigonometric-series

Finite Series - reciprocals of sines

sequences-and-series trigonometry summation trigonometric-series

Sum of tangent functions where arguments are in specific arithmetic series

real-analysis sequences-and-series trigonometric-series