\( (a-b)^{2} \cos ^{2} \frac{C}{2}+(a+b)^{2} \sin ^{2} \frac{C}{2} \) बराबर है-
(A) \( a^{2} \)
...
\( (a-b)^{2} \cos ^{2} \frac{C}{2}+(a+b)^{2} \sin ^{2} \frac{C}{2} \) बराबर है-
(A) \( a^{2} \)
(B) \( b^{2} \)
(C) \( c^{2} \)
(D) इनमें से कोई नहीं।
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