[Delta ABC," if "a,b,c" are in "A.P.," then "cos((A-C)/(2))cos ec((B)/(2))=],[" a) "1/2quad " b) "2quad " c) "1/3]

In Delta ABC , if a,b,c are in A.P, then cos((A-C)/2)cosec(B/2)=

If a,b,c are in A.P. Then cos "" ( A-C)/( 2) cosec ""(B)/(2) =

If in a Delta ABC, a, b, c are in A.P . Then cos ((A- C)/( 2)) is equal to

In Delta ABC , If a, b,c are in A.P., then Cot . A/2 ,Cot. B/2 , Cot . C/2 are in

If a^(2), b^(2), c^(2) are in A.P., then : (cos A)/a, (cos B)/b, (cos C)/c are in

In triangle ABC if a, b, c are in A.P., then the value of (sin.(A)/(2)sin.(C)/(2))/(sin.(B)/(2)) =

In any triangle ABC, if a,b,c are in A.P. then tan ""A/2, tan ""B/2, tan ""C/2 are in -

In triangle ABC if a, b, c are in A.P., then the value of (sin.(A)/(2)sin.(C)/(2))/(sin.(B)/(2)) =

If in Delta ABC, reciprocals of the sides a,b,c are in A.P.prove that : cos ec^(2)(A)/(2),cos ec^(2)(B)/(2),cos ec^(2)(C)/(2) are in A.P.

If a,b and c be in A.P. prove that cos A cot((A)/(2)),cos B cot((B)/(2)), and cos C cot((C)/(2)) are in A.P.