Предмет: Алгебра, автор: GGamer349

решите уравнение cos 2x=-1

Ответы

Автор ответа: Танюшапухня

2х= $\pi$ +2 $\pi$ n,n принадлежит Z,
х=( $\pi$ +2 $\pi$ n)/2

abduqodirovaziz: Можете посоветовать книгу, чтобы научиться решать тригонометрические уравнения?

Танюшапухня: учебник " алгебра и начала анализа", 10-11 класс под ред. Мордковича

abduqodirovaziz: Спасибо! у меня 1 августа тесты, надо научиться решать триг. уравнения и неравенства. Как думаете успею?

Танюшапухня: простейшие может успеете. а так тригонометрию в школе изучают 4 месяца

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Помогите,пожалуйста.
Put the verbs in brackets into the correct form.

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B: No, I'd rather ........................... (stay) at home.

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B: I'd rather you ..... (not/touch) it, actually. I'll do it myself.

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B: I'll make you some sandwiches tomorrow then.

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B: Not really. I would rather we ........ (see) a comedy instead.

13. A: Shall we stay in tonight?

B: Well, if you don't mind I would prefer …. (visit) my parents.