Question

Решите уравнение:
Cos t= -одна вторая

Answer 1

Решение
cost = - 1/2
t = (+-)arccos(-1/2) + 2πk, k ∈Z
t = (+-)(π - arccos(1/2)) + 2πk, k ∈Z
t = (+-)(π - π/3) + 2πk, k ∈Z
t = (+-)(2π/3) + 2πk, k ∈Z