Question

If A+B = 45°, then the value of 2(1+ tanA)(1+ tan B) is:​

Answer 1

Since A+B = 45
Use tan operator on both sides
Therefore you get : tanA + tanB + tanAtanB = 1
Upon expanding the the expression, you get 2(1+tanA+tabB+tanAtanB)
Upon solving you get the answer 4

Answer 2

Answer:

• tan a+b=1 =tana+tanb/1+tanatanb