ABC*P-I*(A+B)/(C)=(cos(A-B))/(sin C/2)

If in a hat harr ABC,(sin A)/(sin C)=(sin(A-B))/(sin(B-C)), prove that a^(2),b^(2),c^(2) are in A.P.

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)

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 Delta ABC, (cos A)/(c sin B)+(cos B)/( a sin C)+(cos C)/( b sin A) =

In any Delta ABC, prove that: (sin B)/(sin C)=(c-a cos B)/(b-a cos C)

In any Delta ABC ,prove that (sin B)/(sin C)=(c-a cos B)/(b-a cos C)

In a / _ABC, (i) (a) / (cos A) = (b) / (cos B) (ii) 2sin A cos B = sin C

In triangle ABC, if (2(sin B-sin C))/((cos B+cos C))=(sin A)/(1-cos A) then the value of (b)/(c). is equal to

In a triangle ABC if (sin2A+sin2B+sin2C)/(cos A+cos B+cos C-1)=((lambda)/(2))cos((A)/(2))cos((B)/(2))cos((C)/(2)) then lambda equals

In Delta ABC , if ( sin A)/(4) = (sin B)/(5) = (sin C)/( 6) then the value of cos A +cos B +cos C =