Question

please solve my following queries- 1. if sin A sin B - cos Acos B + 1=0 prove that : 1 +cot A tan B =0 2. If tan x+ tan(x+pi/3) + tan(x+2pi/3) =3 prove that : (3tan x - tan 3 x) / (1 -3tan 2 x) = 1 3. If tan(A+B) = x , tan (A-B)=y find tan 2A and tan 2B

Answer 1

hope this helps you quickly.
regards!!!!!!!