Can you calculate Pi using a Solver?

[J-F Garnier]

(12-14-2019 10:51 AM)EdS2 Wrote:  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.

Following your suggestion, here is a solution of Euler's equation on the HP32S (I like this little machine:-):

LBL E
INPUT X
RCL X
0
CMPLXe^X
1
+
x^2
x<>y
x^2
+
RTN

Then:
FN= E
SOLVE X

The 32S displays "NO ROOT FND" but the best guess 3.14159265359 is in X.

Anyhow, for me it's a complicated way to just solve COS(X)=-1.

J-F