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

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Show that in a triangle ABC, cot(A/2) + cot(B/2) + cot(C/2) = cot(A/2)*cot(B/2)*cot(C/2) Show that in a triangle ABC, cot(A/2) + cot(B/2) + cot(C/2) = cot(A/2)*cot(B/2)*cot(C/2)
In `DeltaABC`, if a,b,c (taken in that order) are in A.P. then `cot(A/2)cot(C/2)=` In `DeltaABC`, if a,b,c (taken in that order) are in A.P. then `cot(A/2)cot(C/2)=`
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In a `"DeltaA B C` prove that `tan(("A"+"B")/2)=cot("C"/2)` In a `"DeltaA B C` prove that `tan(("A"+"B")/2)=cot("C"/2)`