Question 984810


{{{-1-i}}} = {{{sqrt(2)}}}.{{{(-sqrt(2)/2 - (sqrt(2)/2)*i)}}} = {{{sqrt(2)}}}.{{{(cos(-3pi/4) + i*sin(-3pi/4))}}} = {{{sqrt(2)}}}.{{{(cos(5pi/4) + i*sin(5pi/4))}}} = {{{sqrt(2)}}}*(cos(225°) + i*sin(225°)).