Решение 1) sin(2x + π/2) = 1 cos2x = 1 2x = 2πk, k∈Z x = πk, k∈Z 2) cos(x/2 - π/3) = 0 x/2 - π/3 = π/2 + πn, n∈Z x/2 = π/2 +π/3 + πn, n∈Z x/2 = 5π/6 + πn, n∈Z x = 5π/3 + 2πn, n∈Z