Question

Which of the following is a third root of the given complex number? 64(cos(pi/7) + i sin(pi/7))

a. 4(cos(pi/21)+i sin(pi/21))
b. 64(cos(pi/21)+i sin(pi/21))
c. 4(cos(12pi/21)+i sin(12pi/21))
d. 4(cos(15pi/21)+i sin(15pi/21))

Answer 1

@amistre64