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солнышко109
@солнышко109
June 2022
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13 номер , пожалуйста .
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m11m
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13.
a) При у= -1
cosx= -1
x=π+2πk, k∈Z
При к=2 x=π+2π*2=5π
б) При у=1/2
cosx=1/2
x₁=π/3 + 2πk, k∈Z
При к=2 x=π/3 + 2π*2 = π/3 + 4π = 13π/3
x₂= -π/3 + 2πk, k∈Z
При к=2 x= -π/3 + 2π*2= -π/3 + 4π = 11π/3
Ответ: 11π/3; 13π/3; 5π.
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Answers & Comments
Verified answer
13.a) При у= -1
cosx= -1
x=π+2πk, k∈Z
При к=2 x=π+2π*2=5π
б) При у=1/2
cosx=1/2
x₁=π/3 + 2πk, k∈Z
При к=2 x=π/3 + 2π*2 = π/3 + 4π = 13π/3
x₂= -π/3 + 2πk, k∈Z
При к=2 x= -π/3 + 2π*2= -π/3 + 4π = 11π/3
Ответ: 11π/3; 13π/3; 5π.