1.

In ∆ABC, tan\((\frac{A-B}{2})\).tan\(\frac{c}{2}\) =(A) a+b/a-b(B) a2+b2/a2-b2(C) a2-b2/a2+b2(D) a-b/a+b

Answer»

Correct option is: (D) \(\frac{a-b}{a+b}\)



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