\( \triangle A B C \) में, यदि \( 2 s=a+b+c \), तब \( \frac{s(s-a)}{b c}-\frac{(s-b)(s-c)}{b c} ...
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\( \triangle A B C \) में, यदि \( 2 s=a+b+c \), तब \( \frac{s(s-a)}{b c}-\frac{(s-b)(s-c)}{b c} \) का मान है
(A) \( \sin A \)
(B) \( \cos A \)
(C) \( \tan A \)
(D) इनमें से कोई नहीं
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