Предмет: Математика, автор: Sfhjdsr4

L - альфа
(2-sinL) (2 +sinL) - 3
Решите пожалуйста

Ответы

Автор ответа: Sanyasha
0
=4-sin^2 L -3=1-sin^2L=cos^2L
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TEST
Elementary
1. Hello! I'm John and I ... from Chicago.
A. are
B. be
C. am
2. My name ... Olga.
A. am
B. is
C. -
3. Mary and Nick ... from Canada.
A. be
B. are
C. is
4. "...he British?" "No, he ...."
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B. Be/aren't
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A. aren't
B. isn't
C. be
6. ... German, English, and Chinese.
A. Olga sister is speak
B. Olga sister speak
C. Olga's sister speaks
7. Where ... Mike ... ?
A. does/live
B. does/lives
C. do/lives
8. 'Does Helen love her job?' 'Yes, ....'
A. she loves
B. she so
C. she does
9. I... on Saturday or Sunday.
A. doesn't work
B. not work
C. don't work
10. 'Where ... you ... ?' 'In a bank.'
A. are/work
B. do/work
C. does/work
11. We... TV after dinner.
A. watch
B. do watch
C. watches
12. ... plants in the bed-room.
A. There is some
B. There are some
C. Are there any
13. '... there a sofa in the living room?'
No, there ...
A. Are/aren't
B. Is/isn't
C. Aren't/is
14. There ... pictures in the house.
A. isn't any
B. not any
c. aren't any
15. Please put ... cups ... the cupboard.
A. this on
B. those/in
c. that/by
16. He ... swim quite well, but she ... drive.
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17. ... Joe ... the piano?
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18. Where ... your father born?
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19. 1 ... school in 1990.
A. don't start
B. didn't started
c. didn't start
20. She ... to the UK in 2003.
A. went
B. goed
wents
21. ... they ... a new car last month?
A. Did/buy
B. Do/buy
C. Did/bought

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