[tex]5sin2x+5cosx-8sinx-4=0[/tex] - №19060307

[tex]5sin2x+5cosx-8sinx-4=0[/tex]
- Предмет:
  Алгебра
- Автор:
  bizzy
- 6 лет назад

Ответы 1

10sinxcosx+5cosx-8sinx-4=05cosx(2sinx+1)-4(2sinx+1)=0(2sinx+1)(5cosx-4)=02sinx+1=0sinx=-1/2x=(-1)^(n+1)*π/6+πn,n∈z2cosx-4=0cosx=0,8x=+-arccos0,8+2πk,k∈z
- Автор:
  malik32
- 6 лет назад
- 0
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When you leave school you understand that the time to choose your future profession has come. It's not an easy task to make the right choice of a job. I have known for a long time that leaving school is the beginning of my independent life, the beginning of a far more serious examination of my abilities and character.
I have asked myself a lot of times: "What do I want to be when I leave school?" A few years ago it was difficult for me to give a definite answer. As the years passed I changed my mind a lot of times about which science or field of industry to specialize in. It was difficult to make up my mind and choose one of the hundreds of jobs to which I might be better suited.
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More and more people realise that every educated person should know a foreign language. That's why I'm going to become an English teacher. I always remember these famous words and I'm going to teach them to my pupils: "He, who doesn't know a foreign language, doesn't know his own language".

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