task/29411923 Решить уравнение (cosx+1/2)(cosx-1) = 0
(cosx+1/2)(cosx-1) = ⇔ [ cosx = -1/2 ; cosx =1 .⇔ [x =±2π/3 +2πn ; x =2πn ,n∈ℤ.
task/29411923 Решить уравнение (cosx+1/2)(cosx-1) = 0
(cosx+1/2)(cosx-1) = ⇔ [ cosx = -1/2 ; cosx =1 .⇔ [x =±2π/3 +2πn ; x =2πn ,n∈ℤ.