Return an exact answer on the home screen.

[pwarmuth]

It would be nice if the Prime had the option to return either the decimal approximation of something like sqrt(2) + 1, or the exact answer while on the home screen. This is particularly the case when evaluating trig functions like sin(45). I'd like it to be able to display the answer as sqrt(2)/2 or it's numerical approximation, or even both simultaneously. If the answer contains an irrational constant, I'd like the option of having the answer contain that constant. Modern scientific calculators (no CAS) like the $40 Casio fx-991ex, $20 fx-113es, and even the venerable $20 TI 36x Pro do this, and I expect it from a scientific calculator that touts a textbook display.

I realize the CAS already does this, but you can't always use the CAS. Say for instance if a teacher locks it down for a test. Just because we don't have the capability to manipulate symbolic expressions doesn't mean that we should be limited to decimal approximations.