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## Homework Statement

So I'm trying to find the modulus and argument of

cosh(iπ)

## Homework Equations

## The Attempt at a Solution

so far coshπi = ½(e

^{iπ}+e

^{-iπ}) Im now a bit stuck as what to do as i have two terms in the form e

^{ix}and I'm not sure hw to combine them to get the argument?