в) 6 sin π/6 - 2 cos 0 + tg² π/3

sin π/6 = 1/2, cos 0 = 1, tg² π/3 = (sin π/3 / cos π/3)² = sqrt(3)² = 3. Ответ: 6*(1/2) - 2*1 + 3 = 4.