We improve the Jordan, Adamović-Mitrinović, and Cusa inequalities. As applications, several new Shafer-Fink type inequalities for inverse sine function and bivariate means inequalities are established, and a new estimate for sine integral is given.
"A Note on Jordan, Adamović-Mitrinović, and Cusa Inequalities." Abstr. Appl. Anal. 2014 1 - 12, 2014. https://doi.org/10.1155/2014/364076