Question

If tanA.tanB= tan 45°, then find sin (A+B)

Answer 1

I think the answer will be be 1.
Take A=30°
B=60°

Answer 2

Answer:

0

Step-by-step explanation:

tanA.tanB = tan 45 = 1

tan(A+B) = (tanA+tanB)/1-tanAtanB

tan(A+B) = (tanA+tanB)/ 1 - 1 = 0

sin(A+B)/cos(A+B) = 0

sin(A+B) = 0