укажите наименьший положительный корень уравнения cosx=1/2 варианты ответов : а) 1/2, б) - №16853029

укажите наименьший положительный корень уравнения cosx=1/2 варианты ответов : а) 1/2, б) п/3, в)п/6, г)п/4, д) 1
- Предмет:
  Математика
- Автор:
  devenwu
- 6 лет назад

Ответы 1

cosx=1/2x=+-Π/3+2Πk, k€ZОтвет: б).
- Автор:
  bricemxri
- 6 лет назад
- 0
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This article is about my trip to Australia last month. Such a big country with so much to see and only two weeks to see it in!
I travelled with my friend and her family. We flew into Sydney, Australia's biggest city. Of course, we saw the Opera House and the harbour bridge. They are the symbols of Australia and I was really impressed by them. And we spent a day on the beach watching the surfers — everyone is so relaxed and happy there.
Then we went to Canberra, which is the capital, and I thought it was the most beautiful city in Australia. It is surrounded by rivers and lots of trees but it also has lots of museums and art galleries. We met lots of nice people there. Australians are very friendly and they call everyone "mate".
After that we flew right across the continent to Darwin in the North. It's a tropical area and at our hotel we had a barbecue and I tasted crocodile meat for the first time. It was really delicious, believe it or not!
Next, we took a small plane to the heart of Australia to visit the Uluru National Park, which is one of the most impressive places in the world. We stayed at a campsite there, which was great fun. The Olga Rocks (or Kata Tjuta. which means "a place of many heads") are very spectacular — so many colours and shapes. Uluru itself is the world's biggest rock mass and it stands high above the flat lands all around. It is a sacred place for the native Australians (we shouldn't call them Aborigines) and there are lots of fascinating myths and legends about it. Oh, and we saw lots of kangaroos and wallabies there.
All too soon it was time to fly back to Sydney for our return journey. There was no time for Melbourne or the Great Barrier Reef: they'll have to wait for my next visit. As we flew home I thought about all the amazing things I'd seen. Australia is a magnificent country and I'd love to go again if I ever get the chance.
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