`sum_(m=1)^32 m [sum_(k=1)^6 sin 2kpi/7 -i cos 2kpi/7]`

sum_(k=1)^6[sin((2kpi)/(7))-icos((2kpi)/(7))]=

sum_(k=1)^6 (sin,(2pik)/7 -icos, (2pik)/7)=?

Find sum_(k=1)^6 (sin,(2pik)/7 -icos, (2pik)/7)=?

The value of sum_(k=1)^(6)[" sin"(2Kpi)/(7)- i " cos"(2Kpi)/(7)] is

sum_(m=1)^(4n+1)[sum_(K=1)^(m-1){sin((2k pi)/(m))-i cos((2k pi)/(m))}^(m)]

Find the value of sum_(k=1)^(10){sin((2kpi)/(11))-i cos ((2kpi)/(11))}

I : sum_(k=1)^(6)[sin((2kpi)/(7))-icos((2kpi)/(7))]=i II : sum_(r=1)^(8)[sin((2pir)/(9))+icos((2pir)/(9))]=i Which of the above statements are true

sum_ (k = 1) ^ (6) (sin, (2 pi k) / (7) -i cos, (2 pi k) / (7)) =?