Two identical antennas are placed in the θ =π/2 plane as shown in Figure. The elements have equal amplitude excitation with 180°polarity difference operating at wavelength λ The correct value of the magnitude of the far zone resultant electric field strength normalized with that of a single element both computer for Φ= 0 is
(a) 2 cos(2πs/λ)
(b)2 sin(2πs/λ)
(c)2 sin (2πs/λ)
(d)2 sin (πs/λ)