5sinп/3 3 tg п/3- 5 cos п/3 - 10ctg п/4

5 * Sin(π/3) * 3 * tg(π/3) – 5 * Cos(π/3) – 10 * ctg(π/4) = 5 * (√/3/3) * 3 * √3 – 5 * (1/2) – 10 * 1 = 15 – 2,5 – 10 = (15 – 12,5) = 2,5. Ответ: 2,5.