Предмет: Математика, автор: Xalkl

Cos 2 x =1 уравнение сводящиеся к прстейшим

Ответы

Автор ответа: к1р2у3т4ь

1. вв.з.(введем замену) cosx=t
t^2+5t-6=0
D=49
t1=1
t2=-11/2
В.к.з(вернемся к замене) cosx=1 , x=2пиК
cosx=-11/2 (не может быть)

Там + замена

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