Tg 3x=3
3X= arctg 3+ πn,n принадлежит Z
x= (arctg 3+ πn)/3,n принадлежит Z
Можно ли сделать так:
x=arctg 1 +πn/3,n принадлежит Z
x=π/4+πn/3,n принадлежит Z?
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