       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/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)^(1/3))*
(-I + Sqrt)*(Sqrt*(-1 + Sqrt) +
2*I*Sqrt[5 + Sqrt]) + (-1 - I*Sqrt)^(1/3)*
(I + Sqrt)*(I*Sqrt*(-1 + Sqrt) +
2*Sqrt[5 + Sqrt])))

%//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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