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

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If `a^2,b^2,c^2` are in A.P., prove that `cotA ,cotB ,cotC` are in `AdotPdot` If `a^2,b^2,c^2` are in A.P., prove that `cotA ,cotB ,cotC` are in `AdotPdot`
If `a^2 , b^2 , c^2` are in A.P., then prove that `cot A, cot B, cot C` are in A.P. If `a^2 , b^2 , c^2` are in A.P., then prove that `cot A, cot B, cot C` are in A.P.
Show that cot(A-B) = (1+ cotA cotB)/(cotB -cotA). if cotA =½, cotB =2 and cotC =3 then cot(A-B-C)=3. Show that cot(A-B) = (1+ cotA cotB)/(cotB -cotA). if cotA =½, cotB =2 and cotC =3 then cot(A-B-C)=3.
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)
if `A+B+C=pi` prove that `cot(A/2)+cot(B/2)+cot(C/2)=cot(A/2)xxcot(B/2)xxcot(C/2)` if `A+B+C=pi` prove that `cot(A/2)+cot(B/2)+cot(C/2)=cot(A/2)xxcot(B/2)xxcot(C/2)`
If `A+B+C=pi`, prove that : `cot( A/2)+ cot(B/2) + cot( C/2) = cot( A/2) cot(B/2) cot(C/2)` If `A+B+C=pi`, prove that : `cot( A/2)+ cot(B/2) + cot( C/2) = cot( A/2) cot(B/2) cot(C/2)`
For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`... For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`...
If A+B+C=π, Prove: cotA/2 + cotB/2 + cotC/2 = cotA/2.cotB/2.cotC/2 | JEE,11th,12th,CBSE,ICSE If A+B+C=π, Prove: cotA/2 + cotB/2 + cotC/2 = cotA/2.cotB/2.cotC/2 | JEE,11th,12th,CBSE,ICSE