i) If `A+B=pi/4` prove that: `(cotA-1)(cotB-1)=2`

If A+B=pi//4 , then prove that (cotA-1)(cotB-1)=2

If A+B=pi/4 , prove that: (1+t a n A)(1+t a n B)=2 (cotA-1)(cotB-1)=2

If A+B=45^@ , then (cotA-1)(cotB-1)=

If A+B=225^(@) , prove that: (cotA)/(1+cotA) xx (cotB)/(1+cotB) = 1/2

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

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

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

If A+B=45^(@) , then (cotA-1) (cotB-1) is equal to

If A+B+C = pi , prove that : cotAcotBcotC=cotA+cotB +cotC-cosecAcosecBcosecC.