tg 60°-tg 30° ____________ 1+tg 30°.tg 60°

Tan 60°= sin60° / Cos60° = ½√3 / ½
=√3

Tan 30° = sin30° / cos30° = ½ / ½√3 = ⅓√3

maka
√3 . ⅓√3 / 1+⅓√3.√3

= ⅓(3) / 1+(1/3)(3)
= 1 / 1+1
=1/2