If `A+B=pi/4`, prove that:
`(1+tanA)(1+tanB)=2`

If A-B=pi/4 , then prove that: (1+tanA)(1-tanB)=2

If A-B=pi/4 , then prove that: (1+tanA)

If A+B = (pi)/4 , then prove that (1+tanA)(1+tanB) = 2 .

If A+B = pi/4 , then prove that (1+tanA ) (1+tanB)=2 .

If A+B=pi/4 show that (1+tanA)(1+tanB)=2

If A+B+C=pi, prove that (tanA)/(tanBdottanC)+(tanB)/(tanAdott a n C)+(tanC)/(tanAdottanB)=tanA+tanB+tanC-2cot A-2cot B-2cot C

If A+B+C=pi, prove that (tanA)/(tanBdottanC)+(tanB)/(tanAdott a n C)+(tanC)/(tanAdottanB)=tanA+tanB+tanC-2cot A-2cot B-2cot C

If A+B+C=pi, prove that (tanA)/(tanBdottanC)+(tanB)/(tanAdott a n C)+(tanC)/(tanAdottanB)=tanA+tanB+tanC-2cot A-2cot B-2cot C

If A + B = 45^@ , show that (1+tanA) (1+tanB) =2

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