Question

Решите уравнение ctg^2x/2=3

Answer 1

ctg²(x/2)=3
ctg(x/2)=√3   x/2=π/6+πk   x=π/3+2πk
ctg(x/2)=-√3  x/2=5π/6+πk   x=5π/3+2πk
k∈Z