" (iii) If "x+iy=cis alpha" cis "beta" ,then find the value of "x^(2)+y^(2)

If x + iy = cis alpha .cisbeta, then find the valeu of x ^(2) + y ^(2).

If x = cis theta , then find the value of [x^(6) + 1/x^(6)] .

If x = cis theta , then find the value of [x^(6) + 1/x^(6)] .

If x=cis alpha ,y=cis beta , then find xy+(1)/(xy)

If cis alpha.cis beta.cis gamma=cis x then the value of x is

If x=cis alpha ,y=cis beta , then find x^4y^3+(1)/(x^4y^3)

Ifx=cis alpha,b=cis beta,c=cis gamma and x+y+z=0 then find the value of (1)/(x)+(1)/(y)+(1)/(z)

If A, B, C are angles of a triangle such that x = cis A , y = cis B , z = cis C , then find the value of xyz.

If A,B,C are angles of a triangle such that x = cis A , y = cis B , z = cis C , then find the value of xyz .

If alpha and beta are the roots of the equation x^2+4x + 1=0(alpha > beta) then find the value of 1/(alpha)^2 + 1/(beta)^2