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YsiLapiHvost
@YsiLapiHvost
July 2022
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Помогите решить уравнение (желательно с пояснением)
cosx+cos2x+cos5x+cos4x=0
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kalbim
Verified answer
1)
, k∈Z
, k∈Z
2)
Замена: cosx=t∈[-1;1]
Вернемся к замене:
2.1)
, k∈Z
2.2)
, k∈Z
1 votes
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Answers & Comments
Verified answer
1)
, k∈Z
, k∈Z
2)
Замена: cosx=t∈[-1;1]
Вернемся к замене:
2.1)
, k∈Z
2.2)
, k∈Z