Question

Need help for tricky system of trigonometric nonlinear equations

score 56 · Answer 1 · 2019-06-21 14:57:25

56

Views

Need help for tricky system of trigonometric nonlinear equations

Published on 21 Jun 2019 - 14:57

score 48 · Answer 2 · 2019-07-06 20:11:04

48

Views

Short proof (trig function)

Published on 06 Jul 2019 - 20:11

score 65 · Answer 3 · 2019-07-11 11:04:44

65

Views

Convergence bound for $p\left(n\right) = \text{arctan}\left(\frac{2-\sqrt{4-\left(\frac{2}{n}+\frac{1}{n^2}\right)}}{(2+\frac{1}{n})}\right)$

Published on 11 Jul 2019 - 11:04

score 2.1k · Answer 4 · 2019-07-22 06:40:07

2.1k

Views

Evaluating $\sum_{r=1}^n \frac{\tan(x/2^r)}{2^{r-1}\cos(x/2^{r-1})}$

Published on 22 Jul 2019 - 6:40

score 186 · Answer 5 · 2019-07-23 12:10:12

186

Views

How do I solve the equation $2\sin(3x)\cos(4x)=1$?

Published on 23 Jul 2019 - 12:10

score 77 · Answer 6 · 2026-03-25 05:09:42

77

Views

Inverse of a structured matrix of sines.

Published on 25 Mar 2026 - 5:09

score 180 · Answer 7 · 2019-08-06 22:10:09

180

Views

Looking for the general term of the power series for $\frac{1}{\cos{x}-\cos{b}}$

Published on 06 Aug 2019 - 22:10

score 83 · Answer 8 · 2019-08-08 03:43:15

83

Views

How to prove that $2^{n-1} \prod_{k=1}^{n-1} (1- \cos(\frac{2 \pi}{n} k)) = n^2$?

Published on 08 Aug 2019 - 3:43

score 302 · Answer 9 · 2026-03-25 06:51:40

302

Views

Finding a closed form solution for an infinite sum

Published on 25 Mar 2026 - 6:51

score 1k · Answer 10 · 2026-03-25 07:46:30

1k

Views

$S_n = \sum_{r=0}^{n-1} \cos^{-1} ( \frac{n^2+r^2+r}{\sqrt{n^4 +r^4+2r^3+2n^2r^2+2n^2r+n^2+r^2}})$ find$S_{100}$

Published on 25 Mar 2026 - 7:46

score 129 · Answer 11 · 2019-08-15 14:38:37

129

Views

How do I show that the partial sums of the sequence $a_n=\cos( \log n)$ are bounded?

Published on 15 Aug 2019 - 14:38

score 62 · Answer 12 · 2019-08-27 20:54:22

62

Views

Application of central limit theorem for trigonometric polynomial (aka Salem-Zygmund Theorem)

Published on 27 Aug 2019 - 20:54

score 324 · Answer 13 · 2026-03-25 06:50:33

324

Views

Infinite sum of cos(ln(n))/n

Published on 25 Mar 2026 - 6:50

score 207 · Answer 14 · 2019-09-04 17:42:12

207

Views

whats the limit of the sequence $a_n =[3+\cos(nπ/2)]/[2+\sin(nπ/2)] $ when $n\to \infty$

Published on 04 Sep 2019 - 17:42

score 76 · Answer 15 · 2019-09-05 14:57:00

76

Views

Sign of the series $\sum_{n=1}^\infty\frac{\sin(n\alpha)-\sin(n\beta)+\sin(n(\beta-\alpha))}{n^2}$

Published on 05 Sep 2019 - 14:57

List Question

Need help for tricky system of trigonometric nonlinear equations

Short proof (trig function)

Convergence bound for $p\left(n\right) = \text{arctan}\left(\frac{2-\sqrt{4-\left(\frac{2}{n}+\frac{1}{n^2}\right)}}{(2+\frac{1}{n})}\right)$

Evaluating $\sum_{r=1}^n \frac{\tan(x/2^r)}{2^{r-1}\cos(x/2^{r-1})}$

How do I solve the equation $2\sin(3x)\cos(4x)=1$?

Inverse of a structured matrix of sines.

Looking for the general term of the power series for $\frac{1}{\cos{x}-\cos{b}}$

How to prove that $2^{n-1} \prod_{k=1}^{n-1} (1- \cos(\frac{2 \pi}{n} k)) = n^2$?

Finding a closed form solution for an infinite sum

$S_n = \sum_{r=0}^{n-1} \cos^{-1} ( \frac{n^2+r^2+r}{\sqrt{n^4 +r^4+2r^3+2n^2r^2+2n^2r+n^2+r^2}})$ find$S_{100}$

How do I show that the partial sums of the sequence $a_n=\cos( \log n)$ are bounded?

Application of central limit theorem for trigonometric polynomial (aka Salem-Zygmund Theorem)

Infinite sum of cos(ln(n))/n

whats the limit of the sequence $a_n =[3+\cos(nπ/2)]/[2+\sin(nπ/2)] $ when $n\to \infty$

Sign of the series $\sum_{n=1}^\infty\frac{\sin(n\alpha)-\sin(n\beta)+\sin(n(\beta-\alpha))}{n^2}$

Trending Questions

Popular # Hahtags

Popular Questions