Предмет: Алгебра, автор: tonishevyrev21p3c186

решите примеры:

1)cos(arccos12/13)
2)cos(2arctg3)

уравнения:
1)arctg2x=π/6
2)arcctg(-3x)=π/4​

Ответы

Автор ответа: diyaramanyazow
1

Ответ:

1)12 \div 13 \\ 2) - \frac{4}{5}

Приложения:
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Химия, автор: shumezi
Тест з Хімії 11 клас. Фото тесту прікріпленно внизу.
2 года назад
Предмет: Английский язык, автор: lera2008shemet
Помргите пожалуйста. Проверьте, правильно ли я сделала. Только скажите пожалуйста правду. А если что-то не правильное, скажите что. Буду ОЧЕНЬ благодарна. Даю 20 баллов.
2 года назад
Предмет: Английский язык, автор: ivankolisnik
Помогите в решение таска. 1 я решил там добавляется 'im' и будет immature.
Task.Complete the sentences with the correct form of the words in capitals.
1. Even though he’s twenty years old, he is rather ________ MATURE
2. Thomas said that he is ____________________ to attend the meeting because he's ill. I am a little______________________as to whether this is true or not. ABLE, DOUBT
3. The student was very _______ and answered the question but the teacher asked him to try again. NERVE, CORRECT
4. He has become rich in a _____________ way. HONEST
5. I didn't correct your essay because your writing was simply_____________. LEGIBLE
6. The teacher expressed her ___________________ with Tom because he's so _________________ in class. SATISFACTION, OBEDIENT
7. It was ___________ .of you to leave the baby __________ . RESPONSIBLE, ATTENDED
8. Unfortunately, many climbers have been _____________ in their attempts to climb Mt Everest. SUCCESS
9. I detest people who____________________ to use them in ____________ research. TREAT, SCIENCE
10. Driving at speeds of 150 kilometers per hour is not only ___________ BUT also ______________________. LEGAL, SAFE
11. Her ______________________ to help got her into trouble. WILLINGNESS
12. Why do you always have to ______________________with what I say? AGREE
13 She's a very _________ person. She wants everything done immediately. PATIENT
14 Don't sit in that _____________- armchair, sit here. COMFORTABLE
15 Are you sure you didn't ____________ him? He can't have said that. UNDERSTAND
2 года назад
Предмет: География, автор: Аноним
помогите пожалуйста заполнить таблицу
Даю 13 баллов
8 лет назад
Предмет: Математика, автор: rainbow108
помогите! как решать такие уравнения? (3-x)-(x-4)=3
8 лет назад