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

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

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

If A+B =45^@ , then the value of 2(1+ tanA)(1+ tanB) is: यदि A+B =45^@ है, तो 2(1+ tanA)(1+ tanB) का मान होगा :

If 3tanA tanB=1 , then prove that 2cos(A+B)=cos(A-B)

If A+B= pi/4 , then (1+tan A) (1+tanB) is equal

If A-B=(pi)/(4) , then (1+tanA)(1-tanB)=?

If A+B=45^@ then (1+tanA)(1+tanB)=

If A+B+C= pi/2 , show that : tanA tanB + tanB tanC + tanC tanA=1

If A+B=315^@ then (1-tanA)(1-tanB)=

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