Existing CAS commands --> Prime discussion

[Anders]

In CAS mode:
How about enable ∡ so it does polar arithmetic algebraically. e.g. 2∡(π/6) * 3∡(π/6) = 6∡(π/3), (2∡(π/6))^2 = 4∡(π/3) etc for at least +,-,*, / ^ .
Also, how about enable the ∡ button to shift what's in "Ans" between polar and rectangular/Cartesian form algebraically when pressed on it's own (like it does in Home view but in decimal form). e.g. with 4∡(π/3) in Ans pressing ∡ would show 2+2*√3*i pressing ∡ again would return to 4∡(π/3).

These functions are used a lot and this would cut out a lot of time wasted in typing the function names and converting between the two forms etc.