If in `DeltaABC,` the value of `cot A, cot B, cot C ` are in AP show `a ^(2), b^(2), c ^(2)` are in A.P.

If a,b and c are in A.P, show that (b+c), (c+a) and (a+b) are also in A.P.

In any Delta ABC , If cot ""A/2 , cot ""B/2 ,cot ""C/2 are in AP, then a,b,c are in (A) A.P, (b)G.P., (c)H.P., (d)NONE OF THESE

In any Delta ABC , cot(A/2),cot(B/2),cot(C/2) are in A.P. , then

If a, b, c are in A.P, then show that: \ b c-a^2,\ c a-b^2,\ a b-c^2 are in A.P.

In a DeltaABC , 2 Delta (cot B + cot C)=

In a DeltaABC the angles A, B, C are in A.P. show that 2cos""(A-C)/2=(a+c)/sqrt((a^(2)-ac+c^(2)))

If a, b, c are in A.P., prove that a^(2)(b+c),b^(2)(c+a),c^(2)(a+b)" are also in A.P."

If a, b, c are in A.P., show that: (b + c), (c + a) and (a + b) are also in A.P.

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.

In any DeltaABC, sum (b - c) cot A/2 =