Question 88097
{{{7(cos (3pi/2) + i sin (3pi/2) )}}}


{{{7(0 + i sin (3pi/2) )}}} Evaluate {{{cos(3pi/2)}}}


{{{7(0 + i (-1))}}} Evaluate {{{sin(3pi/2)}}}


{{{7(0) + i(7) (-1)}}}  Distribute


{{{0-7i}}} Multiply and simplify