[/_ABC" में,सिद्ध कीजिए : "],[qquad cos((A+B)/(2))=sin(C)/(2)]

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

In /_ABC,cos((B+C)/(2))

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

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

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

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

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

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

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

Assertion A:In/_ABC,sum(cos A)/(sin B sin C)=2 Reason R:In/_ABC,sin A+sin B+sin C=4(cos A)/(2)(cos B)/(2)(cos C)/(2)