Напиши в виде произведения sin2П/5+sinП/5

Question

Напиши в виде произведения sin2П/5+sinП/5

---

Answer 1

Решение
sin2π/5+sinπ/5 = 2sinπ/5*cosπ/5 + sinπ/5 = sinπ/5 * (2cosπ/5 + 1)