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Re: Why all the if's the answer

• To: mathgroup at smc.vnet.net
• Subject: [mg70816] Re: [mg70783] Why all the if's the answer
• From: "Chris Chiasson" <chris at chiasson.name>
• Date: Sat, 28 Oct 2006 05:22:01 -0400 (EDT)
• References: <200610270428.AAA24487@smc.vnet.net>

try definite integration? use Refine? use PiecewiseExpand?

On 10/26/06, aaronfude at gmail.com <aaronfude at gmail.com> wrote:
> Suppose I start with :
>
> f = -Log[y*(1 + Cos[alpha])] + Log[(b*c - b*y + c*y*Cos[alpha] +
> Sqrt[b^2*(c - y)^2 + c^2*y^2 + 2*b*c*(c - y)*y*Cos[alpha]])/c];
>
> which I think is relatively innocent. I then integrate over y:
>
> Assuming[y > 0 &&  c > 0 && b > 0 && alpha > 0 && alpha < Pi/2,
> Integrate[y/c*f, {y, 0, c}]]
>
> After a few hours get a humongous answer with many If's, etc. What else
> can I assume or otherwise do to get an analytical answer?
>
> Many thanks in advance!
>
> Aaron Fude
>
>


-- 
http://chris.chiasson.name/

• References:
  • Why all the if's the answer
    • From: aaronfude@gmail.com