Предмет: Алгебра, автор: lollooool

sin 78*cos 48-sin 12*sin48

Ответы

Автор ответа: FalloutMefistofel
0
Cos (a+b)=cos a cosb -sin a cos a Sin78=cos (90-78)=cos 12 Значит выражение равно cos (12+48)=cos60=0,5
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2. READING
2.1 Read the text and do the exercise below the story.
Out Shopping for Clothes
pem Oky
Mr&Smith has taken time off work to do some clothes shopping for her family. She
is often very busy and her children do not like to go shopping, so as there are a few sales
on in town, she thought this was a good time to find some bargains',
First, she went into Marks and Spencer's where she picked up two polo shirts, a
pair of trousers, trainers and a winter coat for her son. Then she chose a dress, two shirts
and a jacket for her daughter. As she went passed the men's department she found a grey
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of coffee.
Vocabulary
1. bargain - something on sale at a lower price than its true value;
2. tie-
*
3. onesie-
4. cardigan -
F
2.2 Circle T (True) or F (False):
1. It was a weekend,
2. Mrs Smith's children love shopping.
3. She forgot to buy something for her husband,
4. The slippers were on sale.
5. Her son likes Superman.
EEEEE
F
F
F.
F​
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