Предмет: Алгебра, автор: Gapmaria12

Sin 15 Градусов + cos 165 градусов

Ответы

Автор ответа: lubovlubvasil

0

sin15⁰+cos(90⁰+75⁰)=sin15⁰-sin75⁰=2sin( - 30⁰)cos45⁰= - 2* $frac{1}{2}$ * $frac{sqrt{2} }{2}$ =- $frac{ sqrt{2} }{2}$

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: irinarad1234567898

Hon.
I hope you're well. Guess where I went last weekend!
I went to the Nauryz celebrations with my parents. My sister, Zarina, had the flu
so she stayed at home in bed. She was so upset.
The weather was perfect and there were so many people there. Everyone had a
fantastic time. It was amazing. Some great singers performed at the festival. My
favourite was Makpal Zhunusova. She was excellent. There were also fairground
rides, games and theatre plays in the streets. It was really like a big party. We got
some special Nauryz soup in the city square. It was delicious.
Anyway, we had a great time and it's a pity you didn't come. Write to me and let
me know how you are.
Yours,
Amir
скажите где верно а где не верно соч Write True/False to the next sentences.
1. Amir was at the Nauryz celebrations with parents.
2. Zarina went to the celebrations too.
3. There were a lot of people.
4. There weren't any food.
5. Ken went with Amir and his family.
помогите

6 лет назад

Предмет: Алгебра, автор: glyeb

решите пожалуйста даю 20 баллов!!!!!

6 лет назад

Предмет: Другие предметы, автор: sahachepikov13

вычеслить 63,52*0,1=

6 лет назад

Предмет: Алгебра, автор: alina111737

-2(a - 3b) + 3(b - 2a)

9 лет назад

Предмет: Математика, автор: Viktoria0275

Математика 6 класс!Задание 81 #1!Пожалуйста!

9 лет назад