Question: Which of the following expression gives the nulls for the N- element linear array?
Options
A : ?_n=cos^{-1}?(\frac{?}{2?d}[-??\frac{2?n}{N}])
B : ?_n=sin^{-1}?(\frac{?}{2?d}[-??\frac{2?n}{N}])
C : ?_n=cos^{-1}?(\frac{?}{2?d}[-??\frac{?n}{N}])
D : ?_n=cos^{-1}?(\frac{?}{2?d}[??\frac{2?n}{N}])
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