Найди ctg2α, если cosα = 0,8 и α – угол четвёртой четверти (ПОМОГИТЕ!!!) - №27207538

Найди ctg2α, если cosα = 0,8 и α – угол четвёртой четверти (ПОМОГИТЕ!!!)
- Предмет:
  Математика
- Автор:
  edmundobxiv
- 5 лет назад

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  Английский язык
- Автор:
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- 5 лет назад
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Найди ctg2α, если cosα = 0,8 и α – угол четвёртой четверти
- Предмет:
  Математика
- Автор:
  angelley3
- 5 лет назад
- Ответов:
  
  1
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упростить выражение: 1) числитель: 3 в степени восемь пятых ·3 в степени 3/2 ·3 в степени 0, 3 ; знаменатель : 3 в степени 4/5 ·3 в степени 0, 6 . Спасибо Большое!
- Предмет:
  Алгебра
- Автор:
  arcadioy6uv
- 5 лет назад
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I. Выберите правильный ответ

1) My birthday is on (25, May).
a) the twenty – five of May
b) the twenty – fifth of May
c) the twenty – fifth May

2) They’ve got flat (17) on (6) floor in house (123).
a) the seventeenth, the sixth, the one hundred and twenty – third
b) seventeen, six, one hundred and twenty – three
с) seventeen, the sixth, one hundred and twenty – three

3) Catherine (2) put a monument to Peter (1) in St. Petersburg.
a) the second, the first
b) two, one
c) a second, a first

4) She is (2) cousin of Mark’s father.
a) the second
b) two
c) a second

5) (3) song will certainly become a hit.
a) a third
b) the third
c) three

6) The flight (579) starts at (6) sharp.
a) five hundred and seventy – nine, six
b) the five hundred and seventy – ninth, the sixth
c) five hundred and seventy – ninth, six

7) 6028477 (phone number)
a) sixty twenty-eight forty-seven and seven
b) six oh two eight four double seven
c) six oh two eight four seven seven

8) in 1995
a) one thousand nine hundred and ninety - five
b) one double nine five
73
c) nineteen ninety - five

9) 8, 346
a) eight three four six
b) eighty-three forty - six
c) eight thousand three hundred and forty - six

10) 12. 705
a) twelve point seven nought five
b) twelve point seven oh five
c) twelve thousand seven hundred and five

11) ⅞ %
a) seven eighths per cent.
b) seven eighth per cent.
c) seventh eighth per cent

12) In the jungle we were attacked by (1000) of mosquitoes.
a) one thousand
b) thousands
c) a thousand
- Предмет:
  Английский язык
- Автор:
  jasper9
- 5 лет назад
- Ответов:
  
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