Question: The direction of nulls for broadside array of N ?Isotropic sources is given by ___
Options
A : cos^{-1}?([?\frac{n?}{Nd}])
B : cos^{-1}?([?\frac{2n?}{Nd}])
C : cos^{-1}?([?\frac{2?n?}{2Nd}])
D : cos^{-1}?([?\frac{n?}{Nd}])
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