If (1 + cos θ + i sin θ)(1 + cos 2θ + i sin 2θ)=x+iy then y=

If sinA + sinB = l, cosA - cosB = m, then the value of cos(A - B) =

If x+iy= 1/1+ cos θ+ i sin θ, then 4x²=

If x²+x+1=0, then the value of (x+1/x)²+(x²+1/x²)²+...+(x²⁷+1/x²⁷)² is

If (1+ cos θ+ i sin θ)(1+ cos 2θ+i sin2θ)= x+iy, then y=

If u+iv= 2+i/z+3, where z=x+iy, then the values of u, v are

In the Argand plane, the points represented by the complex number s 2-6i, 4-7i, 3-5i and 1-4i form

If  ((1+i)x-2i)/(3+i)+((2-3i)y+i/3-i)=I, then (x,y)=

(1-ω+ω²) (1-ω²+ω⁴) (1-ω⁴+ω⁸)... to 2n factors=

If (a₁+ib₁)( (a₂+ib₂)…. (a_n+ib_n)= A+iB, then (a₁² +b₁²)( a₂² +b₂² )….(a_n² +b_n²)=