If is a complex number of unit modulus and argument , then is equal to
Explanation for the correct option.
Find the argument of the complex number.
It is given that for the complex number , and .
Now, for a complex number , it is known that . So it can be modified as
Now, in the complex number , use equation and substitute for .
So the argument of the complex number is:
And as so, .
Hence, the correct option is C.