Volume 22, Issue 4 Gabriel Bercu Fourier series method related to Wilker-Cusa-Huygens inequalities Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Gabriel Bercu Find more articles with the same keywords trigonometric functions Fourier series analytic inequalities algorithms even functions Find more articles with the same subject classes 41A21 42B05 26D05 26D15