Question

If tan A , tan B = 1 , then (A+B) = ?​

Answer 1

Step-by-step explanation:

tan(A+B)tan(A−B)=1⟹

cos(A+B)cos(A−B)−sin(A+B)sin(A−B)==0⟹

cos(A+B+A−B)=0⟹

cos2A=0⟹

2A=π2

tan2A3=tanπ6=13–√