[49/50G] convert rectangular to exact polar

[BINUBALL]

This calculator doesn't support exact polar mode, but we know this formula.

According to formula, first set calculator angle mode to polar.
   
And enter complex number which you want to convert to polar.
   
Press RS+4 and expand, boom! We get the exact answer!
   
So, \(2+3i = \sqrt{13} \angle{ atan2(\frac{3}{2})}\)
(edited : arctan -> atan2)
If you want to convert a+bi to polar form, there needs more trick. Pull (a+bi)^c on stack and expand.
   
a+bi = (a+bi)^1, so c=1 SUBST, and press EXP2POW, then you get a answer.
   
I see expand to polar method somewhere in this forum, but a+bi convert method is made for myself. Maybe?