RE: Rookie question
- To: mathgroup at smc.vnet.net
- Subject: [mg23753] RE: [mg23658] Rookie question
- From: "Higinio Ramos Calle" <higra at gugu.usal.es>
- Date: Mon, 5 Jun 2000 01:09:48 -0400 (EDT)
- References: <200005290309.XAA14632@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
----- Original Message -----
From: Jose M Lasso <jml at accessinter.net>
To: mathgroup at smc.vnet.net
Subject: [mg23753] [mg23658] Rookie question
> Hi,
>
> Sorry for my ignorance, but I have Mathematica for just 3 days, and I have
> a trouble, I try to calculate the following expression:
> Integrate[1/(2(1-x^2)^(1/2)+(1-x^2)),{x,0,1}], but Mathematica dont give
me
> an answer, the program return the original input, do u have any ideas. Thx
> in advance.Regards
>
> Jose M Lasso
>
> PS:Sorry for my english
>
You can use NIntegrate instead of Integrate when you have to deal with a
difficult integral.
But in this case it is possible to find the integral directly using a change
of variable, setting
x=Sin(t) the integral becomes Integrate[1/(2+Cos[t]),{t,0,Pi/2}] which is
easy to obtain.
Higinio Ramos