👉 Coshery is a mathematical concept in complex analysis, specifically in the field of mathematical functions. It refers to the hyperbolic cosine function, which can be defined as: \[ \cosh x = \sqrt{1 + x^2} \] This function is used in various branches of mathematics and physics. For example, it appears in the theory of complex analysis, where it is used in the study of entire functions and their derivatives. It also has applications in quantum mechanics, particularly