Question 1081333:  Solve for x: (tanx+tan pi/3)/(1-tanx tan pi/3) = root 3 
 Answer by htmentor(1343)      (Show Source): 
You can  put this solution on YOUR website! Using the trig identity tan(x+pi/3) = (tan(x)+tan(pi/3))/(1-tan(x)tan(pi/3)), we need to solve tan(x+pi/3) = sqrt(3) for x 
atan(sqrt(3)) = pi/3, pi/3 + pi, pi/3 + 2pi, ... 
Therefore x+pi/3 = pi/3 -> x = 0 or any multiple of pi
 
 
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