ctg( arcsin1 - arcctg 2)=? решите с объяснениями ! - №16092598

ctg( arcsin1 - arcctg 2)=?
решите с объяснениями !
- Предмет:
  Алгебра
- Автор:
  mackenziejaum
- 6 лет назад

Ответы 1

ctq(arcsin1 -arcctq2)-?---arcsin1 =π/2 ; arcctq2 =α .ctqα =2 ⇒tqα =1/ctqα =1/2.ctq(arcsin1 -arcctq2) =ctq(π/2 -α) =tqα ||по формуле приведения ||=tq(arcctq2) =tq(arctq(1/2)) =1/2.
- Автор:
  skyritter
- 6 лет назад
- 0
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1. Jane met her friend Sam while she... to work.

a) walks

b) was walking

c) walked

2. When I... in the garden, it began to rain.

a) sat

b) was sitting

c) was sat

3. What … when I... last night?

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c) did you do, phoned

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6. Simon … his arm while we …. football.

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7. He didn't see me when I … into the room. He … at that moment.

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