If `alpha = cos((8pi)/11)+i sin ((8pi)/11)` then `Re(alpha + alpha^2+alpha^3+alpha^4+alpha^5)` is

If alpha=cos((8 pi)/(11))+i sin((8 pi)/(11)) then Re(alpha+alpha^(2)+alpha^(3)+alpha^(4)+alpha^(5)) is

If alpha=e^((i8 pi)/(11)), then find Re(alpha+alpha^(2)+alpha^(3)+alpha^(4)+alpha^(5))

If alpha=cos((2 pi)/(5))+i sin((2 pi)/(5)), then find the value of alpha+alpha^(2)+alpha^(3)+alpha^(4)

alpha=e^((2 pi)/(5)i)then1+alpha+alpha^(2)+alpha^(3)+alpha^(4)+2 alpha^(5)=

If alpha=cos((2pi)/7)+i sin((2pi)/7) then a quadratic equation whose roots are (alpha+ alpha^(2)+ alpha^(4)) and (alpha^(3)+ alpha^(5)+alpha^(6))

If alpha=(pi)/(17), then the value of (sin21 alpha-sin alpha)/(sin16 alpha+sin4 alpha) is equal to

If alpha=cos(2 pi)/(7)+i sin(2 pi)/(7) then a quadratic equation whose roots are (alpha+alpha^(2)+alpha^(4)) and (alpha^(3)+alpha^(5)+alpha^(6)) is

If alpha=(pi)/(21) then (sin3 alpha-sin7 alpha)/(sin24 alpha+sin14 alpha)=

If alpha = (pi)/(13), Prove that cos alpha cos 2alpha cos 3alpha cos 4alpha cos 5alpha cos 6alpha = (1)/(64) .