Let `z=(costheta+isintheta)/(costheta-isintheta), pi/4 lt theta lt pi/2`. Then arg(z) =

(1-costheta+isintheta)/(1+costheta-isintheta)

(cos3theta+isin3theta)^5/(costheta+isintheta)^6

Select and write the correct answer from the given alternatives in each of the following: Let z = (costheta + isintheta) / (costheta - isintheta) , pi / 4 < theta < pi / 2 . Then, arg z is

(1+costheta-isintheta)^4 =

((1+costheta+isintheta)/(1+costheta-isintheta))^(n)

(1-costheta+isintheta)^8 =

(1+costheta-isintheta)^(n)

(1-costheta+isintheta)^(6)

(1-costheta+isintheta)^6 =

(costheta+isintheta)^(10)+(costheta-isintheta)^(10)