Cosh threads element-wise over lists and matrices.Other operations useful for manipulation of symbolic expressions involving Cosh include TrigToExp, TrigExpand, Simplify, and FullSimplify. When given exact numerical expressions as arguments, Cosh may be evaluated to arbitrary numeric precision. Cosh automatically evaluates to exact values when its argument is the (natural) logarithm of a rational number. Cosh may also be defined as, where is the base of the natural logarithm Log. Cosh then represents the horizontal coordinate of the intersection point. It is defined for real numbers by letting be twice the area between the axis and a ray through the origin intersecting the unit hyperbola. Cosh is the hyperbolic cosine function, which is the hyperbolic analogue of the Cos circular function used throughout trigonometry.
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