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cot (A-B) = (cotAcotB+1)/(cotA-cotB)...

`cot (A-B) = (cotAcotB+1)/(cotA-cotB)`

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cot(A-B)=(cotA.cotB+1)/(cotB-cotA)

cot(A-B)=(cotA.cotB+1)/(cotB-cotA)

Prove that : cot (A-B)= (cotA cot B+1)/(cotB -cotA) .

Prove that- cot(A+B)=(cotA.cotB-1)/(cotA+cotB)

cot(A+B)=(cotA.cotB-1)/(cotB+cotA)

Prove that : cot (A+B)= (cotA cot B-1)/(cotB + cotA) .

If A+B+C=pi , prove that : (cotB+cotC) (cotC+cotA) (cotA+cotB)=cosecA cosecB cosecC

If A+B+C=pi , prove that : (cotB+cotC) (cotC+cotA) (cotA+cotB)=cosecA cosecB cosecC