Question

Find the fourth roots of 16(cos 200° + i sin 200°) (check my answer).

Answer 1

z1=4thrt(16)*[cos(200/4)+i*sin(200/4)]=2[cos(50)+i*sin(50)]
z2=2[cos(50+90)+i*sin(50+90)]=2[cos(140)+i*sin(140)]
z3=2[cos(140+90)+i*sin(140+90)]=2[cos(230)+i*sin(230)]
z4=2[cos(230+90)+i*sin(230+90)]=2[cos(320)+i*sin(320)]

Answer 2

@Mertsj

Answer 3

Looks good.

Answer 4

Thanks :)