Is super-accuracy matters?

[Jlouis]

On a second thought, if one needs more exact results for professional use (not my case, due serious brain damage), just use a HP 50g in exact mode. After finishes the calculations, just press the the right keys and voila, you have numerical results with the accuracy needed.

But don't try this on a TI NSPIRE cx non CAS, it's impossible. But let's forgive it, it's a just a TI.

Cheers

JL