Volume 23, Issue 2 Iosif Pinelis Identities and inequalities for the cosine and sine functions 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 Iosif Pinelis Find more articles with the same keywords inequalities trigonometric functions cosine function sine function Bessel function series expansions approximations Find more articles with the same subject classes 26D05 26D15 40A25 41A58