if `a=costheta+isintheta` then find `(1+a)(1-a)`

If z=costheta+isintheta then find (1+z)/(1-z)

|1+costheta+isintheta|=

Find (costheta+isintheta)^n

(1-costheta+isintheta)^8 =

(1-costheta+isintheta)^6 =

(1+costheta-isintheta)^4 =

If pi lt theta lt 2pi and z=1+costheta+isintheta , then find the value of |z|.

If one vertex of a square whose diagonals intersect at the origin is 3(costheta+isintheta) , then find the two adjacent vertices.

If one vertex of a square whose diagonals intersect at the origin is 3(costheta+isintheta) , then find the two adjacent vertices.

(1-costheta+isintheta)^(6)