The hyperbolic cosine function, designated by cosh x is defined as cosh x = (1/2) (e^x + e^(-x)).

Show that f(x) = cosh x is an even number.

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- Nov 9th 2008, 06:45 AMmagentaritaHyperbolic Cosine Function
The hyperbolic cosine function, designated by cosh x is defined as cosh x = (1/2) (e^x + e^(-x)).

Show that f(x) = cosh x is an even number. - Nov 9th 2008, 08:59 AMKrizalid
An even funtion satisfies $\displaystyle f(x)=f(-x).$ In the same fashion of your other problem (odd hyperbolic sin function), do it.

- Nov 9th 2008, 10:11 AMHallsofIvy
- Nov 9th 2008, 09:20 PMmagentaritaAre you..
- Nov 9th 2008, 09:21 PMmagentaritaThen....