G.D. Anderson, M.K. Vamanamurthy, and M. Vuorinen, Conformal Invariants, Inequalities and Quasiconformal Maps, John Wiley & Sons, New York, 1997.
Google Scholar
Y.J. Bagul and C. Chesneau, Refined forms of Oppenheim and Cusa-Huygens type inequalities, Acta Comment. Univ. Tartu. Math. 24 (2020), no. 2, 183–194.
Google Scholar
Y.J. Bagul, R.M. Dhaigude, M. Kostić, and C. Chesneau, Polynomial-exponential bounds for some trigonometric and hyperbolic functions, Axioms 10 (2021), no. 4, Paper No. 308, 10 pp.
Google Scholar
B. Chaouchi, V.E. Fedorov, and M. Kostić, Monotonicity of certain classes of functions related with Cusa-Huygens inequality, Chelyab. Fiz.-Mat. Zh. 6 (2021), no. 3, 31–337.
Google Scholar
X.-D. Chen, H. Wang, J. Yu, Z. Cheng, and P. Zhu, New bounds of Sinc function by using a family of exponential functions, Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. RACSAM 116 (2022), no. 1, Paper No. 16, 17 pp.
Google Scholar
C. Chesneau and Y.J. Bagul, A note on some new bounds for trigonometric functions using infinite products, Malays. J. Math. Sci. 14 (2020), no. 2, 273–283.
Google Scholar
A.R. Chouikha, C. Chesneau, and Y.J. Bagul, Some refinements of well-known inequalities involving trigonometric functions, J. Ramanujan Math. Soc. 36 (2021), no. 3, 193–202.
Google Scholar
I.S. Gradshteyn and I.M. Ryzhik, Table of Integrals, Series and Products, Seventh edition, Elsevier/Academic Press, Amsterdam, 2007.
Google Scholar
K.S.K. Iyengar, B.S. Madhava Rao, and T.S. Nanjundiah, Some trigonometrical inequalities, Half-Yearly J. Mysore Univ. Sect. B., N.S. 6 (1945), 1–12.
Google Scholar
R. Klén, M. Visuri, and M. Vuorinen, On Jordan type inequalities for hyperbolic functions, J. Inequal. Appl. 2010, Art. ID 362548, 14 pp.
Google Scholar
Y. Lv, G. Wang, and Y. Chu, A note on Jordan type inequalities for hyperbolic functions, Appl. Math. Lett. 25 (2012), no. 3, 505–508.
Google Scholar
B. Malešević, T. Lutovac, and B. Banjac, One method for proving some classes of exponential analytical inequalities, Filomat 32 (2018), no. 20, 6921–6925.
Google Scholar
B. Malešević and B. Mihailović, A minimax approximant in the theory of analytic inequalities, Appl. Anal. Discrete Math. 15 (2021), no. 2, 486–509.
Google Scholar
D.S. Mitrinović, Analytic Inequalities, Springer-Verlag, Berlin, 1970.
Google Scholar
E. Neuman and J. Sándor, On some inequalities involving trigonometric and hyperbolic functions with emphasis on the Cusa-Huygens, Wilker, and Huygens inequalities, Math. Inequal. Appl. 13 (2010), no. 4, 715–723.
Google Scholar
E. Neuman and J. Sándor, Inequalities for hyperbolic functions, Appl. Math. Comput. 218 (2012), no. 18, 9291–9295.
Google Scholar
C. Qian, X.-D. Chen, and B. Malesevic, Tighter bounds for the inequalities of Sinc function based on reparameterization, Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. RACSAM 116 (2022), no. 1, Paper No. 29, 38 pp.
Google Scholar
J. Sándor, Two applications of the Hadamard integral inequality, Notes Number Theory Discrete Math. 23 (2017), no. 4, 52–55.
Google Scholar
S. Wu and L. Debnath, Wilker-type inequalities for hyperbolic functions, Appl. Math. Lett. 25 (2012), no. 5, 837–842.
Google Scholar
Z.-H. Yang, New sharp bounds for logarithmic mean and identric mean, J. Inequal. Appl. 2013, 2013:116, 17 pp.
Google Scholar
Z.-H. Yang, Refinements of a two-sided inequality for trigonometric functions, J. Math. Inequal. 7 (2013), no. 4, 601–615.
Google Scholar
Z.-H. Yang and Y.-M. Chu, Jordan type inequalities for hyperbolic functions and their applications, J. Funct. Spaces 2015, Art. ID 370979, 4 pp.
Google Scholar
L. Zhang and X. Ma, Some new results of Mitrinović-Cusa’s and related inequalities based on the interpolation and approximation method, J. Math. 2021, Art. ID 5595650, 13 pp.
Google Scholar
L. Zhu, Generalized Lazarevic’s inequality and its applications–Part II, J. Inequal. Appl. 2009, Art. ID 379142, 4 pp.
Google Scholar
L. Zhu, Some new bounds for Sinc function by simultaneous approximation of the base and exponential functions, Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. RACSAM 114 (2020), no. 2, Paper No. 81, 17 pp.
Google Scholar
L. Zhu and R. Zhang, New inequalities of Mitrinović-Adamović type, Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. RACSAM 116 (2022), no. 1, Paper No. 34, 15 pp.
Google Scholar