👉 In mathematics, "cosphered" is a mathematical operation that involves multiplying two complex numbers together. This operation can be useful in various applications such as signal processing, quantum mechanics, and electrical engineering. The formula for cosphered is given by: cosh(x) = e^x + e^-x Where: e is the base of natural logarithms (approximately 2.71828...) This operation can be used to create complex numbers that represent exponential functions or