If `z=1+cos(pi/5)+isin(pi/5)` then `sin(argz)` is equal to

z=cos(pi/6)+isin(pi/6)=?

If z = cos"" pi/4+ isin (pi/6) ,then

If z= cos (pi)/(3) - i sin (pi)/(3) then z^(2)-z+1 is equal to

z=5(cos((7pi)/6)+isin((7pi)/6))=?

Arg{sin8(pi)/(5)+i(1+cos8(pi)/(5))} is equal to:

If z=cos((pi)/(3))-isin((pi)/(3)) then z^(2)-z+1=....

If z=6(cos(2(pi)/(7))+i sin(2(pi)/(7))) and w=3(cos(5(pi)/(7))+i sin(5(pi)/(7))) then what is the value of (z)/(w)