Thank you very much.
Mike Hansen 写道:
> Hello,
>
> 2009/10/12 <wxu...@sohu.com>:
>
>> Hi, everyone, I got the expression,
>>
>> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
>> 4*sin(t)^2*cos(t)^6 + cos(t)^8
>> actually it is 1. how can I get it?
>>
>
> Here you go:
>
> sage: t = var('t')
> sage: a = sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
> 4*sin(t)^2*cos(t)^6 + cos(t)^8
> sage: a.trig_simplify()
> 1
>
> --Mike
>
> >
>
>
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