Решите уравнение:
2cosx+1=0
Варианты ответов:
A)± π/3 +2πk,k∈Z
B)± π/6 +2πk,k∈Z
C)±5π/6 +2πk,k∈Z
D)±2π/3 +2πk,k∈Z
2cosx+1=0
Варианты ответов:
A)± π/3 +2πk,k∈Z
B)± π/6 +2πk,k∈Z
C)±5π/6 +2πk,k∈Z
D)±2π/3 +2πk,k∈Z
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