Возможно ли как нибудь упростить tg(2arctg(1/2))?

tg (2arctg(1/2))
tg 2x=2tg x / [1-(tgx)^2]

tg (2arctg(1/2)) = 2tg(arctg1/2) / (1-tg ^2(arctg 1/2)) = 2 * 1/2 / (1- (1/2)^2) = 1 / (1- 1/4) = 1/ (3/4) =4/3 =1 1/3