Объяснение:
A/2 = A·sin (ω·t)
1/2 = sin (ω·t)
1/2 = sin (ω·0,5)
ω/2 = arcin (1/2)
ω/2 = π / 6
ω = π/3
ω = 2π·ν
Приравняем:
2π·ν = π/3
2ν = 1/3
ν = 1/6 Гц
