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Re: How Expand?

• To: mathgroup at smc.vnet.net
• Subject: [mg127824] Re: How Expand?
• From: Costa Bravo <q13a27tt at aol.com>
• Date: Sat, 25 Aug 2012 04:23:40 -0400 (EDT)
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U¿ytkownik news write:
>
> How can I expand the following :
>
> [ 1 + cos(x) + i sin(x) ]^3
>
> to obtain;
>
> 8 cos(x/2)^3 [cos(3x/2)+ i sin(3x/2)]
>

using the correct code of Mathematica

(1 + Cos[x] + I Sin[x])^3 // Expand // TrigReduce // Simplify

--
  Costa