Re: A89: Re: help me too please!


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Re: A89: Re: help me too please!





>
> >besides the pi symbol, pi can be represented by at least one
summation,
> >and there are some other formulas as well.
>
>
> really?  I haven't seen that yet, what is it?
>

well, since the inverse tangent of infinity is pi/2 I suppose you
could say that pi = 2*arctan(infinity).  (you can type that in on your
calc and it will give pi.)
there is a series representation for pi as well, but I don't remember
what it is and you don't get to that until you work with series (calc
2, maybe higher).



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