Guest Session: 1 Question Remaining. Create Account to save progress.
Login
Complex Numbershard
0:00.0

If z=cos⁡(2π/5)+isin⁡(2π/5)z = \cos(2\pi/5) + i\sin(2\pi/5)z=cos(2π/5)+isin(2π/5), calculate 1+z+z2+z3+z41 + z + z^2 + z^3 + z^41+z+z2+z3+z4.