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Re: Anyone using the Units package extensively?
*To*: mathgroup at smc.vnet.net
*Subject*: [mg45674] Re: Anyone using the Units package extensively?
*From*: bobhanlon at aol.com (Bob Hanlon)
*Date*: Mon, 19 Jan 2004 05:15:18 -0500 (EST)
*References*: <bua34p$img$1@smc.vnet.net>
*Sender*: owner-wri-mathgroup at wolfram.com
Degree is built in to Mathematica
Sin[60 Degree]
Sqrt[3]/2
It will keep exact numbers exact
Sin[37 Degree]
Sin[37*Degree]
N will force numerical evaluation
%//N
0.601815
or you may get some exact numerical results by using FunctionExpand
%%//FunctionExpand // Simplify
(1/2^(1/3))*((1/32 + I/32)*((-(-1 + I*Sqrt[3])^(1/3))*
(-I + Sqrt[3])*(Sqrt[2]*(-1 + Sqrt[5]) +
2*I*Sqrt[5 + Sqrt[5]]) + (-1 - I*Sqrt[3])^(1/3)*
(I + Sqrt[3])*(I*Sqrt[2]*(-1 + Sqrt[5]) +
2*Sqrt[5 + Sqrt[5]])))
%//N // Chop
0.601815
Bob Hanlon
In article <bua34p$img$1 at smc.vnet.net>, AES/newspost <siegman at stanford.edu>
wrote:
<< In article <bu8iv9$au6$1 at smc.vnet.net>, William McHargue <A at B.C> wrote:
> Hello,
>
> I've been using Mathematica for engineering analysis and have come to
> carry units throughout my calculations. Does anyone else do this and
> would you like to exchange tips/tricks?
>
> Regards,
Can't say I do this extensively, but I routinely define
deg = Pi/180.
and then use constructs like
theta = 37 deg
Sin[60 deg]
Print[theta/deg]
to make calculations and results more readable.
Would be glad to hear of other tricks and techniques
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