(2√3-√2)^2=4*3-4√6+2=14-4√6
Sin²4x - cos²4x > -0.5
cos²4x - sin²4x < ½
cos8x < ½
8x ∈ (π/3 + 2πn; 5π/3 + 2πn), n ∈ ℤ
x ∈ (π/24 + πn/4; 5π/24 + πn/4), n ∈ ℤ
Ответ: x ∈ (π/24 + πn/4; 5π/24 + πn/4), n ∈ ℤ
237х=56782-139
237х=56643
х=56643:237
х=239.
41, 31, 12,7, 3,10 или 3,1