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[Gubinelli Massimiliano <address@hidden>]

what i cannot understand is that the expression you tried to differentiate in 
the screenshot you sent was a two variable expression and i do not think sage 
can do it unless you specify which variable you are differentiating with. 

max


On 19 mai 2012, at 00:03, arshpreet singh wrote:

> On Sat, May 19, 2012 at 3:24 AM, Gubinelli Massimiliano
> <address@hidden> wrote:
>> I'm not a sage user but it seems to me that you forgot to specify the
> <snip>
> 
>> sage: u = var('u')
>> sage: diff(sin(u), u)
>> cos(u)
> thanks for you reply now sage plugin is working after restarting
> sage.we can also use diff(sin(u)) it also works.most of the online
> documentation is based on the older versions.see the image below
> 
> http://www.filedropper.com/arsh
> 
> -- 
> 
> Thanks
> Arshpreet singh
> http://arshpreetsingh.wordpress.com/