If the sides `a,b,c` are in A.P., prove that `(tan)A/2+ (tan) c/2=2/3( cot) B/2.`

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

If the sides a,b,c of a triangle ABC are in A.P., prove that cosA "cot" (A)/(2) , cosB "cot" (B)/(2), cosC "cot" (C)/(2) are also in A.P.

In in a triangle ABC , sides a,b,c are in A.P. then tan""A/2 tan""C/2

In in a triangle ABC , sides a,b,c are in A.P. then tan""A/2 tan""C/2

If the sides a,b and c of a ABC are in A.P.,then (tan(A/2)+tan(C/2)):cot(B/2) , is

If a,b,c are in A.P. then tan ""( A)/(2) tan "" ( C) /(2) =

If the side lengths a,b and c are in A.P. then prove that cos ((A-C)/2) = 2sin (B/2)

In Delta ABC , if a,b,c are in A.P, then tan""A/2 tan""C/2 =

In DeltaABC , if a,b,c are in A.P. prove that: cot(A/2),cot(B/2), cot(C/2) are also in A.P.