If z be a complex number satisfying z4 + z3 +2z2 + z + 1 = 0 Then the value of |z|.
θ ∈ [0, 2π] and z1,z2,z3 are three complex numbers such that they are collinear and
(1+|sinθ|)z1 + (|cosθ|−1)z2 - √2z3 =0. If at least one of the complex numbers z1,z2,z3 is
non-zero then number of possible values of θ is