Can you calculate Pi using a Solver?

[EdS2]

(I'm sometimes surprised that I don't already own Pi Unleashed and indeed Pi a source book. Oh, and I see a reviewer mentions Beckman's A History of Pi and Blatner's The Joy of Pi)

Yes, the Gamma function is a nice way in!

I had hopes that Euler's equation would serve - if we could take the magnitude, or the real value, of e^(ix)+1, then we have a (complex) function which takes a real to a real, and the job would be done. But the HP-35s lacks the capability. Can the 15c manage it??