Find the modulus and arguments of the complex numbers.
(i) `(1+i)/(1-i)`, (ii) `1/(1+i)`

Answer

(i) modulus of `(1+i)/(1-i)` is 1 and the argument is `pi/2`.
(ii) modulus of `1/(1+i)` is `1/sqrt(2)`,argument is `-pi/4`.