" (T) "/_ABC" में सिद्ध कीजिए कि "cos((A+B)/(2))=sin(C)/(2)

In a ∆ABC prove that cos((A+B)/(2))=sin(C)/(2)

In a Delta ABC prove that cos((A+B)/(2))])=(sin C)/(2)

यदि triangleABC में (If इन triangleABC), a = (1)/(sqrt(6)-sqrt(2)), b = (1)/(sqrt(6)+sqrt(2)), C = 60^(@) तो सिद्ध कीजिए कि (Prove that) c = (sqrt(4))/(2) .

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

In a ∆ ABC prove that cos ((A+B)/2) = sin (c/2) .

In Delta ABC, cos""(A)/(2) + sin""((B-C)/(2))=

If A + B + C = 180^(@) then P.T. "cos "(A)/(2) + sin ((B - C)/(2)) = 2 "sin" (B)/(2) "cos" (C )/(2)

If A, B , C are angles of a triangle, then P. T sin ^(2) . (A)/(2)+ sin^(2). (B)/(2) - sin ^(2). (C)/(2) =1-2 cos. (A)/(2) cos. (B)/(2) sin .(C)/(2)

If A, B, C are interior angle of triangle ABC then show that sin ((A+B)/2) + cos (( A+ B)/2) = cos (C/2) + sin (C/2)

In any triangle ABC,show that: 2a cos((B)/(2))cos((C)/(2))=(a+b+c)sin((A)/(2))