If `A-B=(3pi)/(4)`, that show that `(1- tan A) (1+tan B)=2`

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

If A+B=(pi)/(4), prove that: (1+tan A)(1+tan B)=2(cot A-1)(cot B-1)=2

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

If A-B=(pi)/(4) then (1+tan A)(1-tan B)=

If A+B=(pi)/(4), then (tan A+1)(tan B+1) equals

If 2A + B = (pi)/(2) or (3pi)/(2) then show that tan A + 2 tan B = tan (A +B).

If A+B=pi/4 ,prove that (1+tan A)(1+tan B)=2

IF A + B = (pi)/(4) then ( tan A +1) ( tan B+1) equals

If A+B + C = pi , show that : tan""(A)/(2) tan""(B)/(2) + tan""(B)/(2)tan""(C)/(2)+tan""(C)/(2)tan""(A)/(2) = 1 .