Вычислить tg(пи/4-a), если tg(a)=2/3

Описание сказки Мороз Иванович (Одоевский В.Ф.) плиз кратко

выберите правельный вариант:

1) What are your plans? What ... read?

a)will you b)do you c)are you going to

2)Tom ... a mobile telephone when ha was ten.

a)has b)had c)has had

3)Tom ... a mobile telephone since September.

a)has b)had c)has had

4)There are no ... in this group.

a)sportsmen b)sportsman c)child

5)... a lot of children in the park today.

a)They are b)Their c)There are

6)Will yoy turn off the radio? I ... listening.

a)don t b)am not c)cannot

7) -Do you want to decorate the room with me?

-OK. I ... meet you here at 6.

a)shall  b)- c)am going to

8) There are a lot of ... her.

a) mice b) mouse c) money

9) My friend won t be there ... .

a) too b) also c) either

10) What are your plans?

What ... do next Sunday.

a)do you b) will you c) are you going to

Исправте ошибки:

1) I visit my grandparents two times the week.

2)I ll at home at eight o clook tomorrow.

3) -How long do they know the doctor?

-For five years

4) There is not cheese in this fridge

5)-Who have soup for dinner?

-We have

6) I am sure we are going to have a dictation tomorrow.

7)-What did she gave you?

-A book

8)He is siting on the teacher s chair now.

9)How long are they going to stay in these city?

Найти cosa если sina= корень из 3/2 и а принадлежит (0;0.5п)

помогите! Какие течение омывают австралию...как их обозначить?