Юля sin(π - x) - cos(π/3 + x) = √3 sin(π - x) + sin(x - π/6) = √3 2sin(5π/12)cos(7π/12 - x) = √3 cos(7π/12 - x) = √6/(1 + √3) x = 7π/12 ± arccos(√6/(1 + √3)) + 2πk, k - целое.