Tg(x+П/4)+tg(x-П/4)=2ctgx
Помогите решать
Tgx+1/1-tgx+tgx-1/1+tgx-2/tgx=0 tg²x+2tgx+1-tg²x+2tgx-1/1-tg²x-2/tgx=0 4tgx/1-tg²x-2/tgx=0 4tg²x-2+2tg²x/tgx(1-tg²x)=0 tg²x=1/3 tgx=1/√3 tgx=-1/√3 x=π/6+πn x=-π/6+πn tgx≠0 tgx≠1 tgx≠-1 x≠πn x≠π/4+πn x≠-π/4+πn ответ +-π/6+πn