$\pi$ and $\pi^2$ are irrational

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\pi is irrational

To make it clearer that \pi is irrational because \pi^2 is irrational, have a look at http://planetmath.org/?op=getobj&from=objects&id=5779

Re: \pi is irrational

Sincerely, what we won with this Mr. Gunnar? I think that anyway we must read the Lambert's hard paper.

$\pi$ and $\pi^2$ are irrational

In general,
$\cos{x} \neq \pi\cos{\pix}$
and
$\sin{x} \neq \sin{\pix}$

Re: \pi is irrational

Well of course it's interesting to read that paper. I'll start googling for it.