Journal of Mathematical Inequalities · Volume 17, Issue 2 Sharp inequalities of Iyengar-Madhava Rao-Nanjundiah type including cos(x/√3 + axr) 17-44 Pages 671-681 DOI 10.7153/jmi-2023-17-44 Downloads Short PDF Full PDF PNG Authors Keisuke Murata Yusuke Nishizawa Atsuya Sakamoto Keywords inequalities trigonometric functions Iyengar-Madhava Rao-Nanjundiah inequality Adamović-Mitrinović inequality best possible constant Subject classes 26D05 26D07 26D15