Find the normalized Array factor when two antenna elements are separated by a distance of λ/4 and phase difference is 0 and θ=0?

• A. \(cos⁡(\frac{π}{4})\)
• B. \(cos⁡(\frac{π}{2})\)
• C. \(cos⁡(\frac{3π}{4})\)
• D. \(cos⁡(\frac{3π}{2})\)