Re: Are hyperbolic functions supported in .NET CF?

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From: Geoff Schwab [MSFT] (a-geosch_at_online.microsoft.com)
Date: 02/26/04 

Date: Thu, 26 Feb 2004 10:17:53 -0800

Alex,

You can expect to see this in the next FAQ rev. Thanks Alex. 

-- 
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility
http://msdn.microsoft.com/mobility/prodtechinfo/devtools/netcf/FAQ/default.aspx
This posting is provided "AS IS" with no warranties, and confers no rights.
"Alex Feinman [MVP]" <public_news@alexfeinman.com> wrote in message
news:%23Ohi7JJ$DHA.684@tk2msftngp13.phx.gbl...
> This is one of those confusing "Supported by API/Not supported by platform
> cases". The class definition (Math) has it for compatibility, but will
throw
> an exception when you try using it. Luckily all hyperbolic functions are
> easily represented via exponential function:
>
> sinh(x) = (exp(x) - exp(-x))/2
> cosh(x) = (exp(x) + exp(-x))/2
> tanh(x) = (exp(x) - exp(-x))/(exp(x) + exp(-x))
>
> and Exp is present and implemented. Similarly, reverse hyperbolic
functions
> can also be represented via more basic functions:
> asinh(z) = log(z + sqrt(z*z +1))
> etc...
>
> "Gavin" <anonymous@discussions.microsoft.com> wrote in message
> news:DC974BD7-B9D5-435E-9B54-011A5B042E75@microsoft.com...
> > Hi
> >
> > In the documentation it states Math.cosh is supported by the .NET
Compact
> Framework. But if a add the line to my application:
> >
> > Math.cosh(0.34)
> >
> > I will get the error message: Run-time exception thrown :
> System.NotSupportedException - NotSupportedException
> >
> > Is the documentation wrong?
> >
> > Gavin
>
>

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