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    btalley Posts: 1, Reputation: 1
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    #1

    Jul 17, 2012, 07:16 AM
    proving identities solver
    cosh x - sinh x = e^-x
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    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jul 17, 2012, 07:27 AM
    This simply requires substituting the definition for cosh(x) and sinh(x) - do you know how these two functions are defined?
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