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Vihlyanova
@Vihlyanova
June 2022
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решите уравнение (cosx-1)(3cosx+4)=0
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mmb1
Verified answer
(cosx-1)(3cosx+4)=0
cosx=1
x=2*pi*n
cosx=-4/3 нет решений косинус больше -1 и меньше 1
1 votes
Thanks 2
OneOfNice
Совокупность:
cosx-1=0
3cosx+4=0;
1)cosx=1
x=
+2
n, n∈Z
2)cos=-4\3
x=+-(
-arccos(4\3))+2
n, n∈Z
1 votes
Thanks 2
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Answers & Comments
Verified answer
(cosx-1)(3cosx+4)=0cosx=1
x=2*pi*n
cosx=-4/3 нет решений косинус больше -1 и меньше 1
cosx-1=0
3cosx+4=0;
1)cosx=1
x=+2n, n∈Z
2)cos=-4\3
x=+-(-arccos(4\3))+2n, n∈Z