The hyperbolic cosine function, denoted by cosh, is defined by the equation cosh(x) = (ex + e-x) (a) Without a calculator, find cosh(0). cosh (0) = 1 Using a calculator, find cosh(2) and cosh(-2), rounding the answers to two decimal places. cosh (2) = 3.7621 cosh(-2) = 1

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