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жук234
@жук234
July 2022
1
5
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Решите уравнение:
2-[tex] sin^{2} [/tex]x=[tex] cos^{2} [/tex]x+cos([tex] \frac \pi {2}{ } [/tex]-3x)
б) Укажите корни, принадлежащие промежутку
[-[tex] \frac \pi {2}{} [/tex];[tex] \frac \pi {2}{} [/tex]).
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mikael2
Cos(π/2-3x)=2-1=1
sin3x=1 3x=π/2+2πn x=π/6+2πn/3 n∈Z
[-π/2;π/2) ∈ π/6;-π/2
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Answers & Comments
sin3x=1 3x=π/2+2πn x=π/6+2πn/3 n∈Z
[-π/2;π/2) ∈ π/6;-π/2