Generalizations and Improvements of Approximations of Some Analytic Functions: A Survey

The Natural Approaches of Shafer-Fink Inequality for Inverse Sine Function

“…Remark 5. In the process of proving Theorems 1 and 2, we prove that a n , b n > 0, which just meet a condition in a theorem called "Theorem on double-sided TAYLOR's approximations" (see [21] (Theorem 4), [22] (Theorem 2), [23] (Theorem 22)). Therefore, the proofs of Theorems 1 and 2 can be completed by "Theorem on double-sided TAYLOR's approximations".…”