2.4 Решить: sin(17π/6) * cos(5π/3) - cos(17π/6) * sin(5π/3)

Используем формулу синуса разности углов: sin(a - b) = sin(a)cos(b) - cos(a)sin(b). В нашем случае a = 17π/6, b = 5π/3. sin(17π/6 - 5π/3) = sin(17π/6 - 10π/6) = sin(7π/6) = -1/2. Ответ: -1/2