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Kolyan22812
@Kolyan22812
July 2022
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помогите решить тригонометрическое уравнение 5соs(2x+п/2)=-2,5
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армения20171
5cos(2x+π/2)=-2,5
-5cos(2x)=-2,5
cos2x=-2,5:(-5)
cos2x=1/2
2x=-+π/3+2πn
x=(-+)π/6+πn n€Z
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Answers & Comments
-5cos(2x)=-2,5
cos2x=-2,5:(-5)
cos2x=1/2
2x=-+π/3+2πn
x=(-+)π/6+πn n€Z