Cos t>=1/3

cos t < = - 1/2

sin t<=-1/2

sin t> корень из 3 на 2

sin t <=2/3

sin t > = корень из 2 на 2

1) cos t≥1/3;

-arccos 1/3+2πn≤t≤arccos 1/3+2πn, n∈Z.

2) cos t≤-1/2;

arccos (-1/2) + 2πn≤t≤2π-arccos (-1/2) + 2πn, n∈Z;

π-arccos 1/2+2πn≤t≤2π - (π-arccos 1/2) + 2πn, n∈Z;

π-π/3+2πn≤t≤π+π/3+2πn, n∈Z;

2π/3+2πn≤t≤4π/3+2πn, n∈Z.

3) sin t≤-1/2;

-π-arcsin (-1/2) + 2πn≤t≤arcsin (-1/2) + 2πn, n∈Z;

-π+arcsin 1/2+2πn≤t≤-arcsin 1/2+2πn, n∈Z;

-π+π/6+2πn≤t≤-π/6+2πn, n∈Z;

-5π/6+2πn≤t≤-π/6+2πn, n∈Z.

4) sin t>√3/2;

arcsin √3/2+2πn
π/3+2πn≤t≤π-π/3+2πn, n∈Z;

π/3+2πn≤t≤2π/3+2πn, n∈Z.

5) sin t≤2/3;

-π-arcsin 2/3+2πn≤t≤arcsin 2/3+2πn, n∈Z.

6) sin t≥√2/2;

arcsin √2/2+2πn≤t≤π-arcsin √2/2+2πn, n∈Z;

π/4+2πn≤t≤π-π/4+2πn, n∈Z;

π/4+2πn≤t≤3π/4+2πn, n∈Z.