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Log-trigonometric integrals and elliptic functions

General Mathematics 2020-12-03 v1

Abstract

A class of log-trigonometric integrals are evaluated in terms of elliptic functions. From this, by using the elliptic integral singular values, one can obtain closed form evaluations of integrals such as 0π/2ln(coshx3+cosln(2cosx)3)dx=π283π4ln(1+3)+13π24ln2. \int\limits_0^{{\pi}/{2}}\ln\left(\cosh\frac{x}{\sqrt{3}}+\cos\frac{\ln \left(2\cos x\right)}{\sqrt{3}}\right)dx=\frac{\pi^2}{8\sqrt{3}}-\frac{\pi}{4}\ln\left(1+\sqrt{3}\right)+\frac{13\pi}{24}\ln 2.

Keywords

Cite

@article{arxiv.2012.01161,
  title  = {Log-trigonometric integrals and elliptic functions},
  author = {Martin Nicholson},
  journal= {arXiv preprint arXiv:2012.01161},
  year   = {2020}
}

Comments

10 pages

R2 v1 2026-06-23T20:40:12.230Z