In this paper, we obtain a sharp double inequality between the inverse tangent and inverse hyperbolic sine functions. At the same time, we give a sharp double inequality between the inverse hyperbolic tangent and inverse sine functions.

中文翻译：

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与某些反三角函数和反双曲函数相关的不等式

在本文中，我们在反正切函数和反双曲正弦函数之间获得了一个尖锐的二重不等式。同时，我们给出了反双曲正切函数和反正弦函数之间的尖锐二重不等式。