Предмет: Математика, автор: Hfguhc

6 sin(-735°)cos(-345°)

Ответы

Автор ответа: Аноним

- 6 sin (720° + 15°)·cos (360° - 15°) = - 6 sin 15°·cos 15° = - 3 sin 30° = -3/2

(sin2α = 2sinα·cosα)

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o 6 form 1 variant
1. What
you at the weekend?
A) does / does B) do 7 does C) does / do D) do / do
2. What Dick and Tom like ?
A) do / doing B) doing/ C) do / do D) doos / doing
3. Do boys like jeans?
A) wear B) wearing C) to wear D) worn
4. My classmates on picnic every month.
A) went B) goes C) going D) go
5. Mary
face every morning,
A) washes his B) wash my C) washes her D) washes their
6. 1
a cigarette, but my teacher smoke.
A) don't / smokes B) smoke / doesn't C) smokes / smokes D) smoke / don't
7. They
wash
car every day
A) don't/my B) don't / his C) don't/their D) don't/our
8. My parents
eat meat.
A) don't B) aren't C) doesn't D) are
9. Summer holidays
in June.
A) begins B) begin C) beginning D) began
on
10. We tennis on Monday evenings, but my little sister
Sundays.
A) play / play B) plays / plays C) play / plays D) plays / play
free time.
a lot of things in
11. You
A) do / our B) does / your C) do / my D) do / your
12. My cat licks tail every evening. But my dogs never lick tails.
A) its / their B) its/its C) their / its D) * / *
13. I like football, but my brother doesn't.
A) play B) played C) playing D) plays
14. She likes TV, but her husband doesn't.
A) watching B) to watch C) watches D) watched
15. Her sister doesn't eating a hamburger.
A) like B) likes C) liking D) liked
16. Do you like in your free time?
A) read B) reads C) to read D) reading
17. I like but I like swimming
A) sailing / don't B) sail / doesn't C) sail/ don't D) sail/do
18. Tom her but she doesn't like
19. Andrew buys a newspaper everyday. reads at home,
20. Mike eats cheeseburgers because
likes
21. "What time is it?""3:45"
22. It is half past eight.
23. It is quarter past eight.
24. It is five to nine.
25. It is five past nine, .