Question

1)tgx<1/корень из 3
2) cosx>0
Срочно.)

Answer 1

1
tgx<1/√3
x∈(-π/2+πn;π/6+πn,n∈z)
2
cosx>0
x∈(-π/2+2πn;π/2+2πn,n∈z)