Решите неравенство
[tex]2cos^{2} 2x \geq 1,5[/tex]

2*(1+cos4x)/2≥3/22+2cos4x≥32cos4x≥1cos4x≥1/2-π/3+2πn≤4x≤π/3+2πn-π/12+πn/2≤x≤π/12+πn/12x∈[-π/12+πn/2;π/12+πn/2]