The formula is also one that immediately tells you that
\Gamma(1/2) = \pi^{1/2}
i.e. the value of the Gamma function at x=1/2 is the square root of pi.
The formula is also one that immediately tells you that
\Gamma(1/2) = \pi^{1/2}
i.e. the value of the Gamma function at x=1/2 is the square root of pi.