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

If A+B=225^(@) , then find the value of (cotA)/(1+cotA)xx(cot B)/(1+cotB)

(cosec A. cosecB+cotA . cotB)^2-(cosec A. cotB + cosecB. cot A)^2 is

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

If A+B+C=pi , prove that : (cotA+cotB)/(tanA+tanB) + (cotB+cotC)/(tanB+tanC) + (cotC+cotA)/(tanC+tanA) =1

In a triangle ABC, prove that (cot(A/2)+cot(B/2)+cot(C/2))/(cotA+cotB+cot(C))=((a+b+c)^2)/(a^2+b^2+c^2)

Prove that : cosec A- cot A =(1)/(cosecA+cotA)

Prove that (cotA-cosA)/(cotA+cosA)=(cosecA-1)/(cosecA+1)

Prove that (cotA- cosA)/(cotA+ cosA) = (cosecA -1)/(cosecA+1)

Show that (secA+tanA)/("cosec A"+cot A)=("cosec A"-cotA)/(secA-tanA) .

Prove the following identities: (cotA+cos e cA-1)/(cotA-cos e cA+1)=(1+cosA)/(sinA)