not sure if my method is correct
1 + z^4 = 0
z^4 = -1
z^2 = ±i
Since i = e^(iπ/2) using Euler's formula,
z^2 = e^(iπ/2) or z^2 = -e^(iπ/2)
z = ±e^(iπ/4) or z = ± i e^(iπ/4)
z = ±(cos π/4 + i sin π/4) or ±( - sin π/4 + i cos π/4)
change the sin and cos π/4 to 0.707 can le
