tgx=-sqrt(3)/3
x=-П/6+Пk
tgx = -√3/3
x = arctg(-√3/3) + pik
x = -actg(√3/3) + pik
x = - pi/6 + pik, k∈Z
tgx=-sqrt(3)/3
x=-П/6+Пk
tgx = -√3/3
x = arctg(-√3/3) + pik
x = -actg(√3/3) + pik
x = - pi/6 + pik, k∈Z